E-text prepared by Lisa Miller

THE GOLDEN SCORPION

by

SAX ROHMER

1920

Part I

THE COWLED MAN

I The Shadow of a Cowl
II The Pilbroch of the M'Gregors
III The Scorpion's Tail
IV Mademoiselle Dorian
V The Sealed Envelope
VI The Assistant Commissioner
VII Contents of the Sealed Envelope
VIII The Assistant Commissioner's Theory
IX The Chinese Coin
X "Close Your Shutters at Night"
XI The Blue Ray

Part II

STATEMENT OF M. GASTON MAX

I. THE DANCER OF MONTMARTRE

I Zara el-Khala
II Concerning the Grand Duke
III A Strange Question
IV The Fight in the Cafe

II. "LE BALAFRE"

I I Become Charles Malet
II Baiting the Trap
III Disappearance of Charles Malet
IV I Meet an Old Acquaintance
V Conclusion of Statement

Part III

AT THE HOUSE OF AH-FANG-FU

I The Brain Thieves
II The Red Circle
III Miska's Story
IV Miska's Story (concluded)
V The Heart of Chunda Lal
VI The Man with the Scar
VII In the Opium Den
VIII The Green-Eyed Joss

Part IV

THE LAIR OF THE SCORPION

I The Sublime Order
II The Living Death
III The Fifth Secret of Rache Churan
IV The Guile of the East
V What Happened to Stuart
VI "Jey Bhowani!"
VII The Way of the Scorpion

Part I

THE COWLED MAN

CHAPTER I

THE SHADOW OF A COWL

Keppel Stuart, M.D., F. R. S., awoke with a start and discovered himself to be bathed in cold perspiration. The moonlight shone in at his window, but did not touch the bed, therefore his awakening could not be due to this cause. He lay for some time listening for any unfamiliar noise which might account for the sudden disturbance of his usually sound slumbers. In the house below nothing stirred. His windows were widely open and he could detect that vague drumming which is characteristic of midnight London; sometimes, too, the clashing of buffers upon some siding of the Brighton railway where shunting was in progress and occasional siren notes from the Thames. Otherwise—nothing.

He glanced at the luminous disk of his watch. The hour was half-past two. Dawn was not far off. The night seemed to have become almost intolerably hot, and to this heat Stuart felt disposed to ascribe both his awakening and also a feeling of uncomfortable tension of which he now became aware. He continued to listen, and, listening and hearing nothing, recognized with anger that he was frightened. A sense of some presence oppressed him. Someone or something evil was near him—perhaps in the room, veiled by the shadows. This uncanny sensation grew more and more marked.

Stuart sat up in bed, slowly and cautiously, looking all about him. He remembered to have awakened once thus in India—and to have found a great cobra coiled at his feet. His inspection revealed the presence of nothing unfamiliar, and he stepped out on to the floor.

A faint clicking sound reached his ears. He stood quite still. The clicking was repeated.

"There is someone downstairs in my study!" muttered Stuart.

He became aware that the fear which held him was such that unless he acted and acted swiftly he should become incapable of action, but he remembered that whereas the moonlight poured into the bedroom, the staircase would be in complete darkness. He walked barefooted across to the dressing-table and took up an electric torch which lay there. He had not used it for some time, and he pressed the button to learn if the torch was charged. A beam of white light shone out across the room, and at the same instant came another sound.

If it came from below or above, from the adjoining room or from

Outside in the road, Stuart knew not. But following hard upon the mysterious disturbance which had aroused him it seemed to pour ice into his veins, it added the complementary touch to his panic. For it was a kind of low wail—a ghostly minor wail in falling cadences—unlike any sound he had heard. It was so excessively horrible that it produced a curious effect.

Discovering from the dancing of the torch-ray that his hand was trembling, Stuart concluded that he had awakened from a nightmare and that this fiendish wailing was no more than an unusually delayed aftermath of the imaginary horrors which had bathed him in cold perspiration.

He walked resolutely to the door, threw it open and cast the beam of light on to the staircase. Softly he began to descend. Before the study door he paused. There was no sound. He threw open the door, directing the torch-ray into the room.

Cutting a white lane through the blackness, it shone fully upon his writing-table, which was a rather fine Jacobean piece having a sort of quaint bureau superstructure containing cabinets and drawers. He could detect nothing unusual in the appearance of the littered table. A tobacco jar stood there, a pipe resting in the lid. Papers and books were scattered untidily as he had left them, surrounding a tray full of pipe and cigarette ash. Then, suddenly, he saw something else.

One of the bureau drawers was half opened.

Stuart stood quite still, staring at the table. There was no sound in the room. He crossed slowly, moving the light from right to left. His papers had been overhauled methodically. The drawers had been replaced, but he felt assured that all had been examined. The light switch was immediately beside the outer door, and Stuart walked over to it and switched on both lamps. Turning, he surveyed the brilliantly illuminated room. Save for himself, it was empty. He looked out into the hallway again. There was no one there. No sound broke the stillness. But that consciousness of some near presence asserted itself persistently and uncannily.

"My nerves are out of order!" he muttered. "No one has touched my papers. I must have left the drawer open myself."

He switched off the light and walked across to the door. He had actually passed out intending to return to his room, when he became aware of a slight draught. He stopped.

Someone or something, evil and watchful, seemed to be very near again. Stuart turned and found himself gazing fearfully in the direction of the open study door. He became persuaded anew that someone was hiding there, and snatching up an ash stick which lay upon a chair in the hall he returned to the door. One step into the room he took and paused—palsied with a sudden fear which exceeded anything he had known.

A white casement curtain was drawn across the French windows … and outlined upon this moon-bright screen he saw a tall figure. It was that of a cowled man!

Such an apparition would have been sufficiently alarming had the cowl been that of a monk, but the outline of this phantom being suggested that of one of the Misericordia brethren or the costume worn of old by the familiars of the Inquisition!

His heart leapt wildly, and seemed to grow still. He sought to cry out in his terror, but only emitted a dry gasping sound.

The psychology of panic is obscure and has been but imperfectly explored. The presence of the terrible cowled figure afforded a confirmation of Stuart's theory that he was the victim of a species of waking nightmare.

Even as he looked, the shadow of the cowled man moved—and was gone.

Stuart ran across the room, jerked open the curtains and stared out across the moon-bathed lawn, its prospect terminated by high privet hedges. One of the French windows was wide open. There was no one on the lawn; there was no sound.

"Mrs. M'Gregor swears that I always forget to shut these windows at night!" he muttered.

He closed and bolted the window, stood for a moment looking out across the empty lawn, then turned and went out of the room.

CHAPTER II

THE PIBROCH OF THE M'GREGORS

Dr. Stuart awoke in the morning and tried to recall what had occurred during the night. He consulted his watch and found the hour to be six a. m. No one was stirring in the house, and he rose and put on a bath robe. He felt perfectly well and could detect no symptoms of nervous disorder. Bright sunlight was streaming into the room, and he went out on to the landing, fastening the cord of his gown as he descended the stairs.

His study door was locked, with the key outside. He remembered having locked it. Opening it, he entered and looked about him. He was vaguely disappointed. Save for the untidy litter of papers upon the table, the study was as he had left it on retiring. If he could believe the evidence of his senses, nothing had been disturbed.

Not content with a casual inspection, he particularly examined those papers which, in his dream adventure, he had believed to have been submitted to mysterious inspection. They showed no signs of having been touched. The casement curtains were drawn across the recess formed by the French windows, and sunlight streamed in where, silhouetted against the pallid illumination of the moon, he had seen the man in the cowl. Drawing back the curtains, he examined the window fastenings. They were secure. If the window had really been open in the night, he must have left it so himself.

"Well," muttered Stuart—"of all the amazing nightmares!"

He determined, immediately he had bathed and completed his toilet, to write an account of the dream for the Psychical Research Society, in whose work he was interested. Half an hour later, as the movements of an awakened household began to proclaim themselves, he sat down at his writing-table and commenced to write.

Keppel Stuart was a dark, good-looking man of about thirty-two, an easy-going bachelor who, whilst not over ambitious, was nevertheless a brilliant physician. He had worked for the Liverpool School of Tropical Medicine and had spent several years in India studying snake poisons. His purchase of this humdrum suburban practice had been dictated by a desire to make a home for a girl who at the eleventh hour had declined to share it. Two years had elapsed since then, but the shadow still lay upon Stuart's life, its influence being revealed in a certain apathy, almost indifference, which characterised his professional conduct.

His account of the dream completed, he put the paper into a pigeon-hole and forgot all about the matter. That day seemed to be more than usually dull and the hours to drag wearily on. He was conscious of a sort of suspense. He was waiting for something, or for someone. He did not choose to analyse this mental condition. Had he done so, the explanation was simple—and one that he dared not face.

At about ten o'clock that night, having been called out to a case, he returned to his house, walking straight into the study as was his custom and casting a light Burberry with a soft hat upon the sofa beside his stick and bag. The lamps were lighted, and the book-lined room, indicative of a studious and not over-wealthy bachelor, looked cheerful enough with the firelight dancing on the furniture.

Mrs. M'Gregor, a grey-haired Scotch lady, attired with scrupulous neatness, was tending the fire at the moment, and hearing Stuart come in she turned and glanced at him.

"A fire is rather superfluous to-night, Mrs. M'Gregor," he said. "I found it unpleasantly warm walking."

"May is a fearsome treacherous month, Mr. Keppel," replied the old housekeeper, who from long association with the struggling practitioner had come to regard him as a son. "An' a wheen o' dry logs is worth a barrel o' pheesic. To which I would add that if ye're hintin' it's time ye shed ye're woolsies for ye're summer wear, all I have to reply is that I hope sincerely ye're patients are more prudent than yoursel'."

She placed his slippers in the fender and took up the hat, stick and coat from the sofa. Stuart laughed.

"Most of the neighbors exhibit their wisdom by refraining from becoming patients of mine, Mrs. M'Gregor."

"That's no weesdom; it's just preejudice."
"Prejudice!" cried Stuart, dropping down upon the sofa.

"Aye," replied Mrs. M'Gregor firmly—"preejudice! They're no' that daft but they're well aware o' who's the cleverest physeecian in the deestrict, an' they come to nane other than Dr. Keppel Stuart when they're sair sick and think they're dying; but ye'll never establish the practice you desairve, Mr. Keppel—never—until—"

"Until when, Mrs. M'Gregor?"

"Until ye take heed of an auld wife's advice and find a new housekeeper."

"Mrs. M'Gregor!" exclaimed Stuart with concern. "You don't mean that you want to desert me? After—let me see—how many years is it, Mrs. M'Gregor?"

"Thirty years come last Shrove Tuesday; I dandled ye on my knee, and eh! but ye were bonny! God forbid, but I'd like to see ye thriving as ye desairve, and that ye'll never do whilst ye're a bachelor."

"Oh!" cried Stuart, laughing again—"oh, that's it, is it? So you would like me to find some poor inoffensive girl to share my struggles?"

Mrs. M'Gregor nodded wisely. "She'd have nane so many to share. I know ye think I'm old-fashioned, Mr. Keppel and it may be I am; but I do assure you I would be sair harassed, if stricken to my bed—which, please God, I won't be—to receive the veesits of a pairsonable young bachelor—"

"Er—Mrs. M'Gregor!" interrupted Stuart, coughing in mock rebuke—"quite so! I fancy we have discussed this point before, and as you say your ideas are a wee bit, just a wee bit, behind the times. On this particular point I mean. But I am very grateful to you, very sincerely grateful, for your disinterested kindness; and if ever I should follow your advice——"

Mrs. M'Gregor interrupted him, pointing to his boots. "Ye're no' that daft as to sit in wet boots?"

"Really they are perfectly dry. Except for a light shower this evening, there has been no rain for several days. However, I may as well, since I shall not be going out again."

He began to unlace his boots as Mrs. M'Gregor pulled the white casement curtains across the windows and then prepared to retire. Her hand upon the door knob, she turned again to Stuart.

"The foreign lady called half an hour since, Mr. Keppel."

Stuart desisted from unlacing his boots and looked up with lively interest. "Mlle. Dorian! Did she leave any message?"

"She obsairved that she might repeat her veesit later," replied Mrs. M'Gregor, and, after a moment's hesitation; "she awaited ye're return with exemplary patience."

"Really, I am sorry I was detained," declared Stuart, replacing his boot. "How long has she been gone, then?"

"Just the now. No more than two or three minutes. I trust she is no worse."

"Worse!"

"The lass seemed o'er anxious to see you."

"Well, you know, Mrs. M'Gregor, she comes a considerable distance."

"So I am given to understand, Mr. Keppel," replied the old lady; "and in a grand luxurious car."

Stuart assumed an expression of perplexity to hide his embarrassment. "Mrs. M'Gregor," he said rather ruefully, "you watch over me as tenderly as my own mother would have done. I have observed a certain restraint in your manner whenever you have had occasion to refer to Mlle. Dorian. In what way does she differ from my other lady patients?" And even as he spoke the words he knew in his heart that she differed from every other woman in the world.

Mrs. M'Gregor sniffed. "Do your other lady patients wear furs that your airnings for six months could never pay for, Mr. Keppel?" she inquired.

"No, unfortunately they pin their faith, for the most part, to gaily coloured shawls. All the more reason why I should bless the accident which led Mlle. Dorian to my door."

Mrs. M'Gregor, betraying, in her interest, real suspicion, murmured sotto voce: "Then she is a patient?"

"What's that?" asked Stuart, regarding her surprisedly. "A patient?
Certainly. She suffers from insomnia."

"I'm no' surprised to hear it."

"What do you mean, Mrs. M'Gregor?"

"Now, Mr. Keppel, laddie, ye're angry with me, and like enough I am a meddlesome auld woman. But I know what a man will do for shining een and a winsome face—nane better to my sorrow—and twa times have I heard the Warning."

Stuart stood up in real perplexity. "Pardon my density, Mrs.
M'Gregor, but—er—the Warning? To what 'warning' do you refer?"

Seating herself in the chair before the writing-table, Mrs. M'Gregor shook her head pensively. "What would it be," she said softly, "but the Pibroch o' the M'Gregors?"

Stuart came across and leaned upon a corner of the table. "The
Pibroch of the M'Gregors?" he repeated.

"Nane other. 'Tis said to be Rob Roy's ain piper that gives warning when danger threatens ane o' the M'Gregors or any they love."

Stuart restrained a smile, and, "A well-meaning but melancholy retainer!" he commented.

"As well as I hear you now, laddie, I heard the pibroch on the day a certain woman first crossed my threshold, nigh thirty years ago, in Inverary. And as plainly as I heard it wailing then, I heard it the first evening that Miss Dorian came to this house!"

Torn between good-humoured amusement and real interest, "If I remember rightly," said Stuart, "Mlle. Dorian first called here just a week ago, and immediately before I returned from an Infirmary case?"

"Your memory is guid, Mr. Keppel."

"And when, exactly, did you hear this Warning?"

"Twa minutes before you entered the house; and I heard it again the now."

"What! you heard it to-night?"

"I heard it again just the now and I lookit out the window."

"Did you obtain a glimpse of Rob Roy's piper?"

"Ye're laughing at an old wife, laddie. No, but I saw Miss Dorian away in her car and twa minutes later I saw yourself coming round the corner."

"If she had only waited another two minutes," murmured Stuart. "No matter; she may return. And are these the only occasions upon which you have heard this mysterious sound, Mrs. M'Gregor?"

"No, Master Keppel, they are not. I assure ye something threatens. It wakened me up in the wee sma' hours last night—the piping—an' I lay awake shaking for long eno'."

"How extraordinary. Are you sure your imagination is not playing you tricks?"

"Ah, you're no' takin' me seriously, laddie."

"Mrs. M'Gregor"—he leaned across the table and rested his hands upon her shoulders—"you are a second mother to me, your care makes me feel like a boy again; and in these grey days it's good to feel like a boy again. You think I am laughing at you, but I'm not. The strange tradition of your family is associated with a tragedy in your life; therefore I respect it. But have no fear with regard to Mlle. Dorian. In the first place she is a patient; in the second—I am merely a penniless suburban practitioner. Good-night, Mrs. M'Gregor. Don't think of waiting up. Tell Mary to show Mademoiselle in here directly she arrives—that is if she really returns."

Mrs. M'Gregor stood up and walked slowly to the door. "I'll show
Mademoiselle in mysel', Mr. Keppel," she said,—"and show her out."

She closed the door very quietly.

CHAPTER III

THE SCORPION'S TAIL

Seating himself at the writing-table, Stuart began mechanically to arrange his papers. Then from the tobacco jar he loaded his pipe, but his manner remained abstracted. Yet he was not thinking of the phantom piper but of Mlle. Dorian.

Until he had met this bewilderingly pretty woman he had thought that his heart was for evermore proof against the glances of bright eyes. Mademoiselle had disillusioned him. She was the most fragrantly lovely creature he had ever met, and never for one waking moment since her first visit, had he succeeded in driving her bewitching image from his mind. He had tried to laugh at his own folly, then had grown angry with himself, but finally had settled down to a dismayed acceptance of a wild infatuation.

He had no idea who Mlle. Dorian was; he did not even know her exact nationality, but he strongly suspected there was a strain of Eastern blood in her veins. Although she was quite young, apparently little more than twenty years of age, she dressed like a woman of unlimited means, and although all her visits had been at night he had had glimpses of the big car which had aroused Mrs. M'Gregor's displeasure.

Yes—so ran his musings, as, pipe in mouth, he rested his chin in his hands and stared grimly into the fire—she had always come at night and always alone. He had supposed her to be a Frenchwoman, but an unmarried French girl of good family does not make late calls, even upon a medical man, unattended. Had he perchance unwittingly made himself a party to the escapade of some unruly member of a noble family? From the first he had shrewdly suspected the ailments of Mlle. Dorian to be imaginary—Mlle. Dorian? It was an odd name.

"I shall be imagining she is a disguised princess if I wonder about her any more!" he muttered angrily.

Detecting himself in the act of heaving a weary sigh, he coughed in self-reproval and reached into a pigeon-hole for the MS. of his unfinished paper on "Snake Poisons and Their Antidotes." By chance he pulled out the brief account, written the same morning, of his uncanny experience during the night. He read it through reflectively.

It was incomplete. A certain mental haziness which he had noted upon awakening had in some way obscured the facts. His memory of the dream had been imperfect. Even now, whilst recognizing that some feature of the experience was missing from his written account, he could not identify the omission. But one memory arose starkly before him—that of the cowled man who had stood behind the curtains. It had power to chill him yet. The old incredulity returned and methodically he re-examined the contents of some of the table drawers. Ere long, however, he desisted impatiently.

"What the devil could a penniless doctor have hidden in his desk that was worth stealing!" he said aloud. "I must avoid cold salmon and cucumber in future."

He tossed the statement aside and turned to his scientific paper.

There came knock at the door.

"Come in!" snapped Stuart irritably; but the next moment he had turned, eager-eyed to the servant who had entered.

"Inspector Dunbar has called, sir."

"Oh, all right," said Stuart, repressing another sigh. "Show him in here."

There entered, shortly, a man of unusual height, a man gaunt and square both of figure and of face. He wore his clothes and his hair untidily. He was iron grey and a grim mouth was ill concealed by the wiry moustache. The most notable features of a striking face were the tawny leonine eyes, which could be fierce, which could be pensive and which were often kindly.

"Good evening, doctor," he said—and his voice was pleasant and unexpectedly light in tome. "Hope I don't intrude."

"Not at all, Inspector," Stuart assured him.

"Make yourself comfortable in the armchair and fill your pipe."

"Thanks," said Dunbar. "I will." He took out his pipe and reached out a long arm for the tobacco jar. "I came to see if you could give me a tip on a matter that has cropped up."

"Something in my line?" asked Stuart, a keen professional look coming momentarily into his eyes.

"It's supposed to be a poison case, although I can't see it myself," answered the detective—to whom Keppel Stuart's unusual knowledge of poisons had been of service in the past; "but if what I suspect is true, it's a very big case all the same."

Laying down his pipe, which he had filled but not lighted, Inspector Dunbar pulled out from the inside pocket of his tweed coat a bulging note-book and extracted therefrom some small object wrapped up in tissue paper. Unwrapping this object, he laid it upon the table.

"Tell me what that is, doctor," he said, "and I shall be obliged."

Stuart peered closely at that which lay before him. It was a piece of curiously shaped gold, cunningly engraved in a most unusual way. Rather less than an inch in length, it formed a crescent made up of six oval segments joined one to another, the sixth terminating in a curled point. The first and largest segment ended jaggedly where it had evidently been snapped off from the rest of the ornament—if the thing had formed part of an ornament. Stuart looked up, frowning in a puzzled way.

"It is a most curious fragment of jewellery—possibly of Indian origin," he said.

Inspector Dunbar lighted his pipe and tossed the match-end into the fire. "But what does it represent?" he asked.

"Oh, as to that—I said a curious fragment advisedly, because I cannot imagine any woman wearing such a beastly thing. It is the tail of a scorpion."

"Ah!" cried Dunbar, the tawny eyes glittering with excitement. "The tail of a scorpion! I thought so! And Sowerby would have it that it represented the stem of a Cactus or Prickly Pear!"

"Not so bad a guess," replied Stuart. "There are resemblances—not in the originals but in such a miniature reproduction as this. He was wrong, however. May I ask where you obtained the fragment?"

"I'm here to tell you, doctor, for now that I know it's a scorpion's tail I know that I'm out of my depth as well. You've travelled in the East and lived in the East—two very different things. Now, while you were out there, in India, China, Burma, and so on, did you ever come across a religion or a cult that worshipped scorpions?"

Stuart frowned thoughtfully, rubbing his chin with the mouthpiece of his pipe. Dunbar watched him expectantly.

"Help yourself to whiskey-and-soda, Inspector," said Stuart absently.
"You'll find everything on the side-table yonder. I'm thinking."

Inspector Dunbar nodded, stood up and crossed the room, where he busied himself with syphon and decanter. Presently he returned, carrying two full glasses, one of which he set before Stuart. "What's the answer, doctor?" he asked.

"The answer is no. I am not acquainted with any sect of scorpion-worshippers, Inspector. But I once met with a curious experience at Su-Chow in China, which I have never been able to explain, but which may interest you. It wanted but a few minutes to sunset, and I was anxious to get back to my quarters before dusk fell. Therefore I hurried up my boy, who was drawing the rickshaw, telling him to cross the Canal by the Wu-men Bridge. He ran fleetly in that direction, and we were actually come to the steep acclivity of the bridge, when suddenly the boy dropped the shafts and fell down on his knees, hiding his face in his hands.

"'Shut your eyes tightly, master!' he whispered. 'The Scorpion is coming!'

"I stared down at him in amazement, as was natural, and not a little angrily; for his sudden action had almost pitched me on my head. But there he crouched, immovable, and staring up the slope I say that it was entirely deserted except for one strange figure at that moment crossing the crown of the bridge and approaching. It was the figure of a tall and dignified Chinaman, or of one who wore the dress of a Chinaman. For the extra-ordinary thing about the stranger's appearance was this; he also wore a thick green veil!"

"Covering his face?"

"So as to cover his face completely. I was staring at him in wonder, when the boy, seeming to divine the other's approach, whispered, 'Turn your head away! Turn your head away!"

"He was referring to the man with the veil?"

"Undoubtedly. Of course I did nothing of the kind, but it was impossible to discern the stranger's features through the thick gauze, although he passed quite close to me. He had not proceeded another three paces, I should think, before my boy had snatched up the shafts and darted across the bridge as though all hell were after him! Here's the odd thing, though; I could never induce him to speak a word on the subject afterwards! I bullied him and bribed him, but all to no purpose. And although I must have asked more than a hundred Chinamen in every station of society from mandarin to mendicant, 'Who or what is The Scorpion?' one and all looked stupid, blandly assuring me that they did not know what I meant."

"H'm!" said Dunbar, "it's a queer yarn, certainly. How long ago would that be, doctor?"

"Roughly—five years."

"It sounds as though it might belong to the case. Some months back, early in the winter, we received instructions at the Yard to look out everywhere in the press, in buffets, theatres, but particularly in criminal quarters, for any reference (of any kind whatever) to a scorpion. I was so puzzled that I saw the Commissioner about it, and he could tell me next to nothing. He said the word had come through from Paris, but that Paris seemed to know no more about it than we did. It was associated in some way with the sudden deaths of several notable public men about that time; but as there was no evidence of foul play in any of the cases, I couldn't see what it meant at all. Then, six weeks ago, Sir Frank Narcombe, the surgeon, fell dead in the foyer of a West-End theatre—you remember?"

CHAPTER IV

MADEMOISELLE DORIAN

The telephone bell rang.

Stuart reached across for the instrument and raised the receiver. "Yes," he said—"Dr. Stuart speaking. Inspector Dunbar is here. Hold on."

He passed the instrument to Dunbar, who had stood up on hearing his name mentioned. "Sergeant Sowerby at Scotland Yard wishes to speak to you, Inspector."

"Hullo," said Dunbar—"that you, Sowerby. Yes—but I arrived here only a short time ago. What's that?—Max? Good God! what does it all mean! Are you sure of the number—49685? Poor chap—he should have worked with us instead of going off alone like that. But he was always given to that sort of thing. Wait for me. I'll be with you in a few minutes. I can get a taxi. And, Sowerby—listen! It's 'The Scorpion' case right enough. That bit of gold found on the dead man is not a cactus stem; it's a scorpion's tail!"

He put down the telephone and turned to Stuart, who had been listening to the words with growing concern. Dunbar struck his open palm down on to the table with a violent gesture.

"We have been asleep!" he exclaimed. "Gaston Max of the Paris Service has been at work in London for a month, and we didn't know it!"

"Gaston Max!" cried Start—"then it must be a big case indeed."

As a student of criminology the name of the celebrated Frenchman was familiar to him as that of the foremost criminal investigator in Europe, and he found himself staring at the fragment of gold with a new and keener interest.

"Poor chap," continued Dunbar—"it was his last. The body brought in from Hanover Hole has been identified as his."

"What! it is the body of Gaston Max!"

"Paris has just wired that Max's reports ceased over a week ago. He was working on the case of Sir Frank Narcombe, it seems, and I never knew! But I predicted a long time ago that Max would play the lone-hand game once too often. They sent particulars. The identification disk is his. Oh! there's no doubt about it, unfortunately. The dead man's face is unrecognizable, but it's not likely there are two disks of that sort bearing the initials G.M. and the number 49685. I'm going along now. Should you care to come, doctor?"

"I am expecting a patient, Inspector," replied Stuart—"er—a special case. But I hope you will keep me in touch with this affair?"

"Well, I shouldn't have suggested your coming to the Yard if I hadn't wanted to do that. As a matter of fact, this scorpion job seems to resolve itself into a case of elaborate assassination by means of some unknown poison; and although I should have come to see you in any event, because you have helped me more than once, I came to-night at the suggestion of the Commissioner. He instructed me to retain your services if they were available."

"I am honoured," replied Stuart. "But after all, Inspector, I am merely an ordinary suburban practitioner. My reputation has yet to be made. What's the matter with Halesowen of Upper Wimpole Street? He's the big man."

"And if Sir Frank Narcombe was really poisoned—as Paris seems to think he was—he's also a big fool." retorted Dunbar bluntly. "He agreed that death was due to heart trouble."

"I know he did; unsuspected ulcerative endocarditis. Perhaps he was right."

"If he was right," said Dunbar, taking up the piece of gold from the table, "what was Gaston Max doing with this thing in his possession?"

"There may be no earthly connection between Max's inquiries and the death of Sir Frank."

"On the other hand—there may! Leaving Dr. Halesowen out of the question, are you open to act as expert adviser in this case?"

"Certainly; delighted."

"Your fee is your own affair, doctor. I will communicate with you later, if you wish, or call again in the morning."

Dunbar wrapped up the scorpion's tail in the piece of tissue paper and was about to replace it in his note-case. Then:

"I'll leave this with you, doctor," he said. "I know it will be safe enough, and you might like to examine it at greater leisure."

"Very well," replied Stuart. "Some of the engraving is very minute.
I will have a look at it through a glass later."

He took the fragment from Dunbar, who had again unwrapped it, and, opening a drawer of the writing-table in which he kept his cheque-book and some few other personal valuables, he placed the curious piece of gold-work within and relocked the drawer.

"I will walk as far as the cab-rank with you," he said, finding himself to be possessed of a spirit of unrest. Whereupon the two went out of the room, Stuart extinguishing the lamps as he came to the door.

They had not left the study for more than two minutes ere a car drew up outside the house, and Mrs. M'Gregor ushered a lady into the room but lately quitted by Stuart and Dunbar, turning up the lights as she entered.

"The doctor has gone out but just now, Miss Dorian," she said stiffly. "I am sorry that ye are so unfortunate in your veesits. But I know he'll be no more than a few minutes."

The girl addressed was of a type fully to account for the misgivings of the shrewd old Scotswoman. She had the slim beauty of the East allied to the elegance of the West. Her features, whilst cast in a charming European mould, at the same time suggested in some subtle way the Oriental. She had the long, almond-shaped eyes of the Egyptian, and her hair, which she wore unconventionally in a picturesque fashion reminiscent of the harem, was inclined to be "fuzzy," but gleamed with coppery tints where the light touched its waves.

She wore a cloak of purple velvet having a hooded collar of white fox fur; it fastened with golden cords. Beneath it was a white and gold robe, cut with classic simplicity of line and confined at the waist by an ornate Eastern girdle. White stockings and dull gold shoes exhibited to advantage her charming little feet and slim ankles, and she carried a handbag of Indian beadwork. Mlle. Dorian was a figure calculated to fire the imagination of any man and to linger long and sweetly in the memory.

Mrs. M'Gregor, palpably ill at ease, conducted her to an armchair.

"You are very good," said the visitor, speaking with a certain hesitancy and with a slight accent most musical and fascinating. "I wait a while if I may."

"Dear, dear," muttered Mrs. M'Gregor, beginning to poke the fire, "he has let the fire down, of course! Is it out? No … I see a wee sparkie!"

She set the poker upright before the nearly extinguished fire and turned triumphantly to Mlle. Dorian, who was watching her with a slight smile.

"That will be a comforting blaze in a few minutes, Miss Dorian," she said, and went towards the door.

"If you please," called the girl, detaining her—"do you permit me to speak on the telephone a moment? As Dr. Stuart is not at home, I must explain that I wait for him."

"Certainly, Miss Dorian," replied Mrs. M'Gregor; "use the telephone by all means. But I think the doctor will be back any moment now."

"Thank you so much."

Mrs. M'Gregor went out, not without a final backward glance at the elegant figure in the armchair. Mlle. Dorian was seated, her chin resting in her hand and her elbow upon the arm of the chair, gazing into the smoke arising from the nearly extinguished ember of the fire. The door closed, and Mrs. M'Gregor's footsteps could be heard receding along the corridor.

Mlle. Dorian sprang from the chair and took out of her handbag a number of small keys attached to a ring. Furtively she crossed the room, all the time listening intently, and cast her cloak over the back of the chair which was placed before the writing-table. Her robe of white and gold clung to her shapely figure as she bent over the table and tried three of the keys in the lock of the drawer which contained Stuart's cheque-book and in which he had recently placed the mysterious gold ornament. The third key fitted the lock, and Mlle. Dorian pulled open the drawer. She discovered first the cheque-book and next a private account-book; then from under the latter she drew out a foolscap envelope sealed with red wax and bearing, in Stuart's handwriting, the address:

Lost Property Office,
Metropolitan Police,
New Scotland Yard, S. W. I.

She uttered a subdued exclamation; then, as a spark of light gleamed within the open drawer, she gazed as if stupefied at the little ornament which she had suddenly perceived lying near the cheque-book. She picked it up and stared at it aghast. A moment she hesitated; then, laying down the fragment of gold and also the long envelope upon the table, she took up the telephone. Keeping her eyes fixed upon the closed door of the study, she asked for the number East 89512, and whilst she waited for the connection continued that nervous watching and listening. Suddenly she began to speak, in a low voice.

"Yes! … Miska speaks. Listen! One of the new keys—it fits. I have the envelope. But, also in the same drawer, I find a part of a broken gold 'agrab (scorpion). Yes, it is broken. It must be they find it, on him." Her manner grew more and more agitated. "Shall I bring it? The envelope it is very large. I do not know if——"

From somewhere outside the house came a low, wailing cry—a cry which Stuart, if he had heard it, must have recognized to be identical with that which he had heard in the night—but which he had forgotten to record in his written account.

"Ah!" whispered the girl—"there is the signal! It is the doctor who returns." She listened eagerly, fearfully, to the voice which spoke over the wires. "Yes—yes!"

Always glancing toward the door, she put down the instrument, took up the long envelope and paused for a moment, thinking that she had heard the sound of approaching footsteps. She exhibited signs of nervous indecision, tried to thrust the envelope into her little bag and realized that even folded it would not fit so as to escape observation. She ran across to the grate and dropped the envelope upon the smouldering fire. As she did so, the nicely balanced poker fell with a clatter upon the tiled hearth.

She started wildly, ran back to the table, took up the broken ornament and was about to thrust it into the open drawer, when the study door was flung open and Stuart came in.

CHAPTER V

THE SEALED ENVELOPE

"MADEMOISELLE DORIAN!" cried Stuart joyously, advancing with outstretched hand. She leaned back against the table watching him—and suddenly he perceived the open drawer. He stopped. His expression changed to one of surprise and anger, and the girl's slim fingers convulsively clutched the table edge as she confronted him. Her exquisite colour fled and left her pallid, dark-eyed and dismayed.

"So," he said bitterly—"I returned none too soon, Mlle.—Dorian"

"Oh! she whispered, and shrank from him as he approached nearer.

"Your object in selecting an obscure practitioner for your medical adviser becomes painfully evident to me. Diagnosis of your case would have been much more easy if I had associated your symptoms with the presence in my table drawer of"—he hesitated—"of something which you have taken out. Give me whatever you have stolen and compose yourself to await the arrival of the police."

He was cruel in his disillusionment. Here lay the explanation of his romance; here was his disguised princess—a common thief! She stared at him wildly.

"I take nothing!" she cried. "Oh, let me go! Please, please let me go!"

"Pleading is useless. What have you stolen?"

"Nothing—see." She cast the little gold ornament on the table. "I look at this, but I do not mean to steal it."

She raised her beautiful eyes to his face again, and he found himself wavering. That she had made his acquaintance in order to steal the fragment of the golden scorpion was impossible, for he had not possessed it at the time of her first visit. He was hopelessly mystified and utterly miserable.

"How did you open the drawer?" he asked sternly.

She took up the bunch of keys which lay upon the table and naively exhibited that which fitted the lock of the drawer. Her hands were shaking.

"Where did you obtain this key; and why?"

She watched him intently, her lips trembling and her eyes wells of sorrow into which he could not gaze unmoved.

"If I tell you—will you let me go?"

"I shall make no promises, for I can believe nothing that you may tell me. You gained my confidence by a lie—and now, by another lie, you seem to think that you can induce me to overlook a deliberate attempt at burglary—common burglary." He clenched his hands. "Heavens! I could never have believed it of you!"

She flinched as though from a blow and regarded him pitifully as he stood, head averted.

"Oh, please listen to me," she whispered. "At first I tell you a lie, yes."

"And now?"

"Now—I tell you the truth."

"That you are a petty thief?"

"Ah! you are cruel—you have no pity! You judge me as you judge—one of your Englishwomen. Perhaps I cannot help what I do. In the East a woman is a chattel and has no will of her own."

"A chattel!" cried Stuart scornfully. "Your resemblance to the 'chattels' of the East is a remote one. There is Eastern blood in your veins, no doubt, but you are educated, you are a linguist, you know the world. Right and wrong are recognizable to the lowest savage."

"And if they recognize, but are helpless?"

Stuart made a gesture of impatience.

"You are simply seeking to enlist my sympathy," he said bitterly. "But you have said nothing which inclines me to listen to you any longer. Apart from the shock of finding you to be—what you are, I am utterly mystified as to your object. I am a poor man. The entire contents of my house would fetch only a few hundred pounds if sold to-morrow. Yet you risk your liberty to rifle my bureau. For the last time—what have you taken from that drawer?"

She leaned back against the table, toying with the broken piece of gold and glancing down at it as she did so. Her long lashes cast shadows below her eyes, and a hint of colour was returning to her cheeks. Stuart studied her attentively—even delightedly, for all her shortcomings, and knew in his heart that he could never give her in charge of the police. More and more the wonder of it all grew upon him, and now he suddenly found himself thinking of the unexplained incident of the previous night.

"You do not answer," he said. "I will ask you another question: have you attempted to open that drawer prior to this evening?"

Mlle. Dorian looked up rapidly, and her cheeks, which had been pale, now flushed rosily.

"I try twice before," she confessed, "and cannot open it."

"Ah! And—has someone else tried also?"

Instantly her colour fled again, and she stared at him wide-eyed, fearful.

"Someone else?" she whispered.

"Yes—someone else. A man … wearing a sort of cowl——"

"Oh?" she cried and threw out her hands in entreaty. "Do not ask me of him! I dare not answer—I dare not!"

"You have answered," said Stuart, in a voice unlike his own; for a horrified amazement was creeping upon him and supplanting the contemptuous anger which the discovery of this beautiful girl engaged in pilfering his poor belongings had at first aroused.

The mystery of her operations was explained—explained by a deeper and a darker mystery. The horror of the night had been no dream but an almost incredible reality. He now saw before him an agent of the man in the cowl; he perceived that he was in some way entangled in an affair vastly more complex and sinister than a case of petty larceny.

"Has the golden scorpion anything to do with the matter?" he demanded abruptly.

And in the eyes of his beautiful captive he read the answer. She flinched again as she had done when he had taunted her with being a thief; but he pressed his advantage remorselessly.

"So you were concerned in the death of Sir Frank Narcombe!" he said.

"I was not!" she cried at him fiercely, and her widely opened eyes were magnificent. "Sir Frank Narcombe is——"

She faltered—and ceased speaking, biting her lip which had become tremulous again.

"Sir Frank Narcombe is?" prompted Stuart, feeling himself to stand upon the brink of a revelation.

"I know nothing of him—this Sir Frank Narcombe."

Stuart laughed unmirthfully.

"Am I, by any chance, in danger of sharing the fate of that distinguished surgeon?" he asked.

His question produced an unforeseen effect. Mlle. Dorian suddenly rested her jewelled hands upon his shoulders, and he found himself looking hungrily into those wonderful Eastern eyes.

"If I swear that I speak the truth, will you believe me?" she whispered, and her fingers closed convulsively upon his shoulders.

He was shaken. Her near presence was intoxicating. "Perhaps," he said unsteadily.

"Listen, then. Now you are in danger, yes. Before, you were not, but now you must be very careful. Oh! indeed, indeed, I tell you true! I tell you for your own sake. Do with me what you please. I do not care. It does not matter. You ask me why I come here. I tell you that also. I come for what is in the long envelope—look, I cannot hide it. It is on the fire!"

Stuart turned and glanced toward the grate. A faint wisp of brown smoke was arising from a long white envelope which lay there. Had the fire been actually burning, it must long ago have been destroyed. More than ever mystified, for the significance of the envelope was not evident to him, he ran to the grate and plucked the smouldering paper from the embers.

As he did so, the girl, with one quick glance in his direction, snatched her cloak, keys and bag and ran from the room. Stuart heard the door close, and racing back to the table he placed the slightly charred envelope there beside the fragment of gold and leapt to the door.

"Damn!" he said.

His escaped prisoner had turned the key on the outside. He was locked in his own study!

Momentarily nonplussed, he stood looking at the closed door. The sound of a restarted motor from outside the house spurred him to action. He switched off the lamps, crossed the darkened room and drew back the curtain, throwing open the French windows. Brilliant moonlight bathed the little lawn with its bordering of high privet hedges. Stuart ran out as the sound of the receding car reached his ears. By the time that he had reached the front of the house the street was vacant from end to end. He walked up the steps to the front door, which he unfastened with his latch-key. As he entered the hall, Mrs. M'Gregor appeared from her room.

"I did no' hear ye go out with Miss Dorian," she said.

"That's quite possible, Mrs. M'Gregor, but she has gone, you see."

"Now tell me, Mr. Keppel, did ye or did ye no' hear the wail o' the pibroch the night?

"No—I am afraid I cannot say that I did, Mrs. M'Gregor," replied Stuart patiently. "I feel sure you must be very tired and you can justifiably turn in now. I am expecting no other visitor. Good-night."

Palpably dissatisfied and ill at ease, Mrs. M'Gregor turned away.

"Good-night, Mr. Keppel," she said.

Stuart, no longer able to control his impatience, hurried to the study door, unlocked it and entered. Turning on the light, he crossed and hastily drew the curtains over the window recess, but without troubling to close the window which he had opened. Then he returned to the writing-table and took up the sealed envelope whose presence in his bureau was clearly responsible for the singular visitation of the cowled man and for the coming of the lovely Mlle. Dorian.

The "pibroch of the M'Gregors": He remembered something—something which, unaccountably, he hitherto had failed to recall: that fearful wailing in the night—which had heralded the coming of the cowled man!—or had it been a signal of some kind?

He stared at the envelope blankly, then laid it down and stood looking for some time at the golden scorpion's tail. Finally, his hands resting upon the table, he found that almost unconsciously he had been listening—listening to the dim night sounds of London and to the vague stirrings within the house.

"Now, you are in danger. Before, you were not…."

Could he believe her? If in naught else, in this at least surely she had been sincere? Stuart started—then laughed grimly.

A clock on the mantel-piece had chimed the half-hour.

CHAPTER VI

THE ASSISTANT COMMISSIONER

Detective-Inspector Dunbar arrived at New Scotland Yard in a veritable fever of excitement. Jumping out of the cab he ran into the building and without troubling the man in charge of the lift went straight on upstairs to his room. He found it to be in darkness and switched on the green-shaded lamp which was suspended above the table. Its light revealed a bare apartment having distempered walls severely decorated by an etching of a former and unbeautiful Commissioner. The blinds were drawn. A plain, heavy deal table (bearing a blotting-pad, a pewter ink-pot, several pens and a telephone), together with three uncomfortable chairs, alone broke the expanse of highly polished floor. Dunbar glanced at the table and then stood undecided in the middle of the bare room, tapping his small, widely separated teeth with a pencil which he had absently drawn from his waistcoat pocket. He rang the bell.

A constable came in almost immediately and stood waiting just inside the door.

"When did Sergeant Sowerby leave?" asked Dunbar.

"About three hours ago, sir."

"What!" cried Dunbar. "Three hours ago! But I have been here myself within that time—in the Commissioner's office."

"Sergeant Sowerby left before then. I saw him go."

"But, my good fellow, he has been back again. He spoke to me on the telephone less than a quarter of an hour ago."

"Not from here, sir."

"But I say it was from here!" shouted Dunbar fiercely; "and I told him to wait for me."

"Very good, sir. Shall I make inquiries?"

"Yes. Wait a minute. Is the Commissioner here?"

"Yes, sir, I believe so. At least I have not seen him go."

"Find Sergeant Sowerby and tell him to wait here for me," snapped
Dunbar.

He walked out into the bare corridor and along to the room of the Assistant Commissioner. Knocking upon the door, he opened it immediately, and entered an apartment which afforded a striking contrast to his own. For whereas the room of Inspector Dunbar was practically unfurnished, that of his superior was so filled with tables, cupboards, desks, bureaux, files, telephones, bookshelves and stacks of documents that one only discovered the Assistant Commissioner sunk deep in a padded armchair and a cloud of tobacco smoke by dint of close scrutiny. The Assistant Commissioner was small, sallow and satanic. His black moustache was very black and his eyes were of so dark a brown as to appear black also. When he smiled he revealed a row of very large white teeth, and his smile was correctly Mephistophelean. He smoked a hundred and twenty Egyptian cigarettes per diem, and the first and second fingers of either hand were coffee-coloured.

"Good-evening, Inspector," he said courteously. "You come at an opportune moment." He lighted a fresh cigarette. "I was detained here unusually late to-night or this news would not have reached us till the morning." He laid his finger upon a yellow form. "There is an unpleasant development in 'The Scorpion' case."

"So I gather, sir. That is what brought me back to the Yard."

The Assistant Commissioner glanced up sharply.

"What brought you back to the Yard?" he asked.

"The news about Max."

The assistant Commissioner leaned back in his chair. "Might I ask, Inspector," he said, "what news you have learned and how you have learned it?"

Dunbar stared uncomprehendingly.

"Sowerby 'phoned me about half an hour ago, sir. Did he do so without your instructions?"

"Most decidedly. What was his message?"

"He told me," replied Dunbar, in ever-growing amazement, "that the body brought in by the River Police last night had been identified as that of Gaston Max."

The Assistant Commissioner handed a pencilled slip to Dunbar. It read as follows:—

"Gaston Max in London. Scorpion, Narcombe. No report since 30th ult.
Fear trouble. Identity-disk G. M. 49685."

"But, sir," said Dunbar—"this is exactly what Sowerby told me!"

"Quite so. That is the really extraordinary feature of the affair. Because, you see, Inspector, I only finished decoding this message at the very moment that you knocked at my door!"

"But——"

"There is no room for a 'but,' Inspector. This confidential message from Paris reached me ten minutes ago. You know as well as I know that there is no possibility of leakage. No one has entered my room in the interval, yet you tell me that Sergeant Sowerby communicated this information to you, by telephone, half an hour ago."

Dunbar was tapping his teeth with the pencil. His amazement was too great for words.

"Had the message been a false one," continued the Commissioner, "the matter would have been resolved into a meaningless hoax, but the message having been what it was, we find ourselves face to face with no ordinary problem. Remember, Inspector, that voices on the telephone are deceptive. Sergeant Sowerby has marked vocal mannerisms——"

"Which would be fairly easy to imitate? Yes, sir—that's so."

"But it brings us no nearer to the real problems; viz., first, the sender of the message; and, second, his purpose."

There was a dull purring sound and the Assistant Commissioner raised the telephone.

"Yes. Who is it that wishes to speak to him? Dr. Keppel Stuart?
Connect with my office."

He turned again to Dunbar.

"Dr. Stuart has a matter of the utmost urgency to communicate, Inspector. It was at the house of Dr. Stuart, I take it, that you received the unexplained message?"

"It was—yes."

"Did you submit to Dr. Stuart the broken gold ornament?"

"Yes. It's a scorpion's tail."

"Ah!" The Assistant Commissioner smiled satanically and lighted a fresh cigarette. "And is Dr. Stuart agreeable to placing his unusual knowledge at our disposal for the purposes of this case?"

"He is, sir."

The purring sound was repeated.

"You are through to Dr. Stuart," said the Assistant Commissioner.

"Hullo" cried Dunbar, taking up the receiver—"is that Dr. Stuart?
Dunbar speaking."

He stood silent for a while, listening to the voice over the wires. Then: "You want me to come around now, doctor? Very well. I'll be with you in less than half an hour."

He put down the instrument.

"Something extraordinary seems to have taken place at Dr. Stuart's house a few minutes after I left, sir," he said. "I'm going back there, now, for particulars. It sounds as though the 'phone message might have been intended to get me away." He stared down at the pencilled slip which the Assistant Commissioner had handed him, but stared vacantly, and: "Do you mind if I call someone up, sir?" he asked. "It should be done at once."

"Call by all means, Inspector."

Dunbar again took up the telephone.

"Battersea 0996," he said, and stood waiting. Then:

"Is that Battersea 0996?" he asked. "Is Dr. Stuart there? He is speaking? Oh, this is Inspector Dunbar. You called me up here at the Yard a few moments ago, did you not? Correct, doctor; that's all I wanted to know. I am coming now."

"Good," said the Assistant Commissioner, nodding his approval. "You will have to check 'phone messages in that way until you have run your mimic to earth, Inspector. I don't believe for a moment that it was Sergeant Sowerby who rang you up at Dr. Stuart's."

"Neither do I," said Dunbar grimly. "But I begin to have a glimmer of a notion who it was. I'll be saying good-night, sir. Dr. Stuart seems to have something very important to tell me."

As a mere matter of form he waited for the report of the constable who had gone in quest of Sowerby, but it merely confirmed the fact that Sowerby had left Scotland Yard over three hours earlier. Dunbar summoned a taxicab and proceeded to the house of Dr. Stuart.

CHAPTER VII

CONTENTS OF THE SEALED ENVELOPE

Stuart personally admitted Dunbar, and once more the Inspector found himself in the armchair in the study. The fire was almost out and the room seemed to be chilly. Stuart was labouring under the influence of suppressed excitement and was pacing restlessly up and down the floor.

"Inspector," he began, "I find it difficult to tell you the facts which have recently come to my knowledge bearing upon this most mysterious 'Scorpion' case. I clearly perceive, now, that without being aware of the fact I have nevertheless been concerned in the case for at least a week."

Dunbar stared surprisedly, but offered no comment.

"A fortnight ago," Stuart continued, "I found myself in the neighbourhood of the West India Docks. I had been spending the evening with a very old friend, chief officer of a liner in dock. I had intended to leave the ship at about ten o'clock and to walk to the railway station, but, as it fell out, the party did not break up until after midnight. Declining the offer of a berth on board, I came ashore determined to make my way home by tram and afoot. I should probably have done so and have been spared—much; but rain began to fall suddenly and I found myself, foolishly unprovided with a top-coat, in those grey East End streets without hope of getting a lift.

"It was just as I was crossing Limehouse Causeway that I observed, to my astonishment, the head-lamps of a cab or car shining out from a dark and forbidding thoroughfare which led down to the river. The sight was so utterly unexpected that I paused, looking through the rainy mist in the direction of the stationary vehicle. I was still unable to make out if it were a cab or a car, and accordingly I walked along to where it stood and found that it was a taxicab and apparently for hire.

"'Are you disengaged?' I said to the man. "'Well, sir, I suppose I am,' was his curious reply. 'Where do you want to go?'

"I gave him this address and he drove me home. On arriving, so grateful did I feel that I took pity upon the man, for it had settled down into a brute of a night, and asked him to come in and take a glass of grog. He was only too glad to do so. He turned out to be quite an intelligent sort of fellow, and we chatted together for ten minutes or so.

"I had forgotten all about him when, I believe on the following night, he reappeared in the character of a patient. He had a badly damaged skull, and I gathered that he had had an accident with his cab and had been pitched out into the road.

"When I had fixed him up, he asked me to do him a small favour. From inside his tunic he pulled out a long stiff envelope, bearing no address but the number 30 in big red letters. It was secured at both ends with black wax bearing the imprint of a curious and complicated seal.

"'A gentleman left this behind in the cab today, sir,' said the man—'perhaps the one who was with me when I had the spill, and I've got no means of tracing him; but he may be able to trace me if he happened to notice my number, or he may advertise. It evidently contains something valuable.'

"'Then why not take it to Scotland Yard?' I asked. 'Isn't that the proper course?'

"'It is,' he admitted; 'but here's the point: if the owner reclaims it from Scotland Yard he's less likely to dub up handsome than if he gets it direct from me!'

"I laughed at that, for the soundness of the argument was beyond dispute. 'But what on earth do you want to leave it with me for?' I asked."

"'Self-protection,' was the reply. 'They can't say I meant to pinch it! Whereas, directly there's any inquiry I can come and collect it and get the reward; and your word will back me up if any questions are asked; that's if you don't mind, sir.'

"I told him I didn't mind in the least, and accordingly I sealed the envelope in a yet larger one which I addressed to the Lost Property Office and put into a private drawer of my bureau. 'You will have no objection,' I said, 'to this being posted if it isn't reclaimed within a reasonable time?'

"He said that would be all right and departed—since which moment I have not set eyes upon him. I now come to the sequel, or what I have just recognized to be the sequel."

Stuart's agitation grew more marked and it was only by dint of a palpable effort that he forced himself to resume.

"On the evening of the following day a lady called professionally. She was young, pretty, and dressed with extraordinary elegance. My housekeeper admitted her, as I was out at the time but momentarily expected. She awaited my return here, in this room. She came again two days later. The name she gave was an odd one: Mademoiselle Dorian. There is her card,"—Stuart opened a drawer and laid a visiting-card before Dunbar—"no initials and no address. She travelled in a large and handsome car. That is to say, according to my housekeeper's account it is a large and handsome car. I personally, have had but an imperfect glimpse of it. It does not await her in front of the house, for some reason, but just around the corner in the side turning. Beyond wondering why Mademoiselle Dorian had selected me as her medical advisor I had detected nothing suspicious in her behaviour up to the time of which I am about to speak.

"Last night there was a singular development, and to-night matters came to a head."

Thereupon Stuart related as briefly as possible the mysterious episode of the cowled man, and finally gave an account of the last visit of Mlle. Dorian. Inspector Dunbar did not interrupt him, but listened attentively to the singular story.

"And there," concluded Stuart, "on the blotting-pad, lies the sealed envelope!"

Dunbar took it up eagerly. A small hole had been burned in one end of the envelope and much of the surrounding paper was charred. The wax with which Stuart had sealed it had lain uppermost, and although it had been partly melted, the mark of his signet-ring was still discernible upon it. Dunbar stood staring at it.

"In the circumstances, Inspector, I think you would be justified in opening both envelopes," said Stuart.

"I am inclined to agree. But let me just be clear on one or two points." He took out the bulging note-book and also a fountain-pen with which he prepared to make entries. "About this cabman, now. You didn't by any chance note the number of his cab?"

"I did not."

"What build of man was he?"

"Over medium height and muscular. Somewhat inclined to flesh and past his youth, but active all the same."

"Dark or fair?"

"Dark and streaked with grey. I noted this particularly in dressing his skull. He wore his hair cropped close to the scalp. He had a short beard and moustache and heavily marked eyebrows. He seemed to be very short-sighted and kept his eyes so screwed up that it was impossible to detect their colour, by night at any rate."

"What sort of wound had he on his skull?"

"A short ugly gash. He had caught his head on the footboard in falling. I may add that on the occasion of his professional visit his breath smelled strongly of spirits, and I rather suspected that his accident might have been traceable to his condition."

"But he wasn't actually drunk?"

"By no means. He was perfectly sober, but he had recently been drinking—possibly because his fall had shaken him, of course."

"His hands?"

"Small and very muscular. Quite steady. Also very dirty."

"What part of the country should you say he hailed from?"

"London. He had a marked cockney accent."

"What make of cab was it?"

"I couldn't say."

"An old cab?"

"Yes. The fittings were dilapidated, I remember, and the cab had a very musty smell."

"Ah," said Dunbar, making several notes. "And now—the lady: about what would be her age?"

"Difficult to say, Inspector. She had Eastern blood and may have been much younger than she appeared to be. Judged from a European standpoint and from her appearance and manner of dress, she might be about twenty-three or twenty-four."

"Complexion?"

"Wonderful. Fresh as a flower."

"Eyes?"

"Dark. They looked black at night."

"Hair?"

"Brown and 'fuzzy' with copper tints."

"Tall?"

"No; slight but beautifully shaped."

"Now—from her accent what should you judge her nationality to be?"

Stuart paced up and down the room, his head lowered in reflection, then:

"She pronounced both English and French words with an intonation which suggested familiarity with Arabic."

"Arabic? That still leaves a fairly wide field."

"It does, Inspector, but I had no means of learning more. She had certainly lived for a long time somewhere in the Near East."

"Her jewellery?"

"Some of it was European and some of it Oriental, but not characteristic of any particular country of the Orient."

"Did she use perfume?"

"Yes, but it was scarcely discernible. Jasmine—probably the Eastern preparation."

"Her ailment was imaginary?"

"I fear so."

"H'm—and now you say that Mrs. M'Gregor saw the car?"

"Yes, but she has retired."

"Her evidence will do to-morrow. We come to the man in the hood. Can you give me any kind of a description of him?"

"He appeared to be tall, but a shadow is deceptive, and his extraordinary costume would produce that effect, too. I can tell you absolutely nothing further about him. Remember, I thought I was dreaming. I could not credit my senses."

Inspector Dunbar glanced over the notes which he had made, then returning the note-book and pen to his pocket, he took up the long smoke-discoloured envelope and with a paper-knife which lay upon the table slit one end open. Inserting two fingers, he drew out the second envelope which the first enclosed. It was an ordinary commercial envelope only notable by reason of the number, 30, appearing in large red figures upon it and because it was sealed with black wax bearing a weird-looking device:

Stuart bent over him intently as he slit this envelope in turn. Again, he inserted two fingers—and brought forth the sole contents… a plain piece of cardboard, roughly rectangular and obviously cut in haste from the lid of a common cardboard box!

CHAPTER VIII

THE ASSISTANT COMMISSIONER'S THEORY

On the following morning Inspector Dunbar, having questioned Mrs. M'Gregor respecting the car in which Mlle. Dorian had visited the house and having elicited no other evidence than that it was "a fine luxurious concern," the Inspector and Dr. Stuart prepared to set out upon gruesome business. Mrs. M'Gregor was very favourably impressed with the Inspector. "A grand, pairsonable body," she confided to Stuart. "He'd look bonny in the kilt."

To an East-End mortuary the cab bore them, and they were led by a constable in attendance to a stone-paved, ill-lighted apartment in which a swathed form lay upon a long deal table. The spectacle presented, when the covering was removed, was one to have shocked less hardened nerves than those of Stuart and Dunbar; but the duties of a police officer, like those of a medical man, not infrequently necessitate such inspections. The two bent over the tragic flotsam of the Thames unmoved and critical.

"H'm," said Stuart—"he's about the build, certainly. Hair iron-grey and close cropped and he seems to have worn a beard. Now, let us see."

He bent, making a close inspection of the skull; then turned and shook his head.

"No, Inspector," he said definitely. "This is not the cabman. There is no wound corresponding to the one which I dressed."

"Right," answered Dunbar, covering up the ghastly face. "That's settled."

"You were wrong, Inspector. It was not Gaston Max who left the envelope with me."

"No," mused Dunbar, "so it seems."

"Your theory that Max, jealously working alone, had left particulars of his inquiries, and clues, in my hands, knowing that they would reach Scotland Yard in the event of his death, surely collapsed when the envelope proved to contain nothing but a bit of cardboard?"

"Yes—I suppose it did. But it sounded so much like Max's round-about methods. Anyway I wanted to make sure that the dead man from Hanover Hole and your mysterious cabman were not one and the same."

Stuart entertained a lively suspicion that Inspector Dunbar was keeping something up his sleeve, but with this very proper reticence he had no quarrel, and followed by the constable, who relocked the mortuary behind them, they came out into the yard where the cab waited which was to take them to Scotland Yard. Dunbar, standing with one foot upon the step of the cab, turned to the constable.

"Has anyone else viewed the body?" he asked.

"No sir."

"No one is to be allowed to do so—you understand?—no one, unless he has written permission from the Commissioner."

"Very good, sir."

Half an hour later they arrived at New Scotland Yard and went up to Dunbar's room. A thick-set, florid man of genial appearance, having a dark moustache, a breezy manner and a head of hair resembling a very hard-worked blacking-brush, awaited them. This was Detective-Sargeant Sowerby with whom Stuart was already acquainted.

"Good-morning, Sergeant Sowerby," he said.

"Good-morning, sir. I hear that someone was pulling your leg last night."

"What do you mean exactly, Sowerby?" inquired Dunbar, fixing his fierce eyes upon his subordinate.

Sergeant Sowerby exhibited confusion.

"I mean nothing offensive, Inspector. I was referring to the joker who gave so good an imitation of my voice that even you were deceived."

"Ah," replied Dunbar—"I see. Yes—he did it well. He spoke just like you. I could hardly make out a word he said."

With this Caledonian shaft and a side-glance at Stuart, Inspector
Dunbar sat down at the table.

"Here's Dr. Stuart's description of the missing cabman," he continued, taking out his note-book. "Dr. Stuart has viewed the body and it is not the man. You had better take a proper copy of this."

"Then the cabman wasn't Max?" cried Sowerby eagerly. "I thought not."

"I believe you told me so before," said Dunbar sourly. "I also seem to recall that you thought a scorpion's tail was a Prickly Pear. However—here, on the page numbered twenty-six, is a description of the woman known as Mlle. Dorian. It should be a fairly easy matter to trace the car through the usual channels, and she ought to be easy to find, too."

He glanced at his watch. Stuart was standing by the lofty window looking out across the Embankment.

"Ten o'clock," said Dunbar. "The Commissioner will be expecting us."

"I am ready," responded Stuart.

Leaving Sergeant Sowerby seated at the table studying the note-book,
Stuart and Dunbar proceeded to the smoke-laden room of the Assistant
Commissioner. The great man, suavely satanic, greeted Stuart with
that polished courtesy for which he was notable.

"You have been of inestimable assistance to us in the past, Dr. Stuart," he said, "and I feel happy to know that we are to enjoy the aid of your special knowledge in the present case. Will you smoke one of my cigarettes? They are some which a friend is kind enough to supply to me direct from Cairo, and are really quite good."

"Thanks," replied Stuart. "May I ask in what direction my services are likely to prove available?"

The Commissioner lighted a fresh cigarette. Then from a heap of correspondence he selected a long report typed upon blue foolscap.

"I have here," he said, "confirmation of the telegraphic report received last night. The name of M. Gaston Max will no doubt be familiar to you?"

Stuart nodded.

"Well," continued the Commissioner, "it appears that he has been engaged in England for the past month endeavouring to trace the connection which he claims to exist between the sudden deaths of various notable people, recently—a list is appended—and some person or organisation represented by, or associated with, a scorpion. His personal theory not being available—poor fellow, you have heard of his tragic death—I have this morning consulted such particulars as I could obtain respecting these cases. If they were really cases of assassination, some obscure poison was the only mode of death that could possibly have been employed. Do you follow me?"

"Perfectly."

"Now, the death of Gaston Max under circumstances not yet explained, would seem to indicate that his theory was a sound one. In other words, I am disposed to believe that he himself represents the most recent outrage of what we will call 'The Scorpion.' Even at the time that the body of the man found by the River Police had not been identified, the presence upon his person of a fragment of gold strongly resembling the tail of a scorpion prompted me to instruct Inspector Dunbar to consult you. I had determined upon a certain course. The identification of the dead man with Gaston Max merely strengthens my determination and enhances the likelihood of my idea being a sound one."

He flicked the ash from his cigarette and resumed:

"Without mentioning names, the experts consulted in the other cases which—according to the late Gaston Max—were victims of 'The Scorpion,' do not seem to have justified their titles. I am arranging that you shall be present at the autopsy upon the body of Gaston Max. And now, permit me to ask you a question: are you acquainted with any poison which would produce the symptoms noted in the case of Sir Frank Narcombe, for instance?"

Stuart shook his head slowly.

"All that I know of the case," he said, "is that he was taken suddenly ill in the foyer of a West-End theatre, immediately removed to his house in Half Moon Street, and died shortly afterward. Can you give me copies of the specialists' reports and other particulars? I may then be able to form an opinion."

"I will get them for you," replied the Commissioner, the exact nature of whose theory was by no means evident to Stuart. He opened a drawer. "I have here," he continued, "the piece of cardboard and the envelope left with you by the missing cab-man. Do you think there is any possibility of invisible writing?"

"None," said Stuart confidently. "I have tested in three or four places as you will see by the spots, but my experiments will in no way interfere with those which no doubt your own people will want to make. I have also submitted both surfaces to a microscopic examination. I am prepared to state definitely that there is no writing upon the cardboard, and except for the number, 30, none upon the envelope."

"It is only reasonable to suppose," continued the Commissioner, "that the telephone message which led Inspector Dunbar to leave your house last night was originated by that unseen intelligence against which we find ourselves pitted. In the first place, no one in London, myself and, presumably, 'The Scorpion' excepted, knew at that time that M. Gaston Max was in England or that M. Gaston Max was dead. I say, presumably 'The Scorpion' because it is fair to assume that the person whom Max pursued was responsible for his death.

"Of course"—the Commissioner reached for the box of cigarettes—"were it not for the telephone message, we should be unjustified in assuming that Mlle. Dorian and this"—he laid his finger upon the piece of cardboard—"had any connection with the case of M. Max. But the message was so obviously designed to facilitate the purloining of the sealed envelope and so obviously emanated from one already aware of the murder of M. Max, that the sender is identified at once with— 'The Scorpion.'"

The Assistant Commissioner complacently lighted a fresh cigarette.

"Finally," he said, "the mode of death in the case of M. Max may not have been the same as in the other cases. Therefore, Dr. Stuart"—he paused impressively—"if you fail to detect anything suspicious at the post mortem examination I propose to apply to the Home Secretary for power to exhume the body of the late Sir Frank Narcombe!"

Deep in reflection, Stuart walked alone along the Embankment. The full facts contained in the report from Paris the Commissioner had not divulged, but Stuart concluded that this sudden activity was directly due, not to the death of M. Max, but to the fact that he (Max) had left behind him some more or less tangible clue. Stuart fully recognized that the Commissioner had accorded him an opportunity to establish his reputation—or to wreck it.

Yet, upon closer consideration, it became apparent that it was to Fate and not to the Commissioner that he was indebted. Strictly speaking, his association with the matter dated from the night of his meeting with the mysterious cabman in West India Dock road. Or had the curtain first been lifted upon this occult drama that evening, five years ago, as the setting sun reddened the waters of the Imperial Canal and a veiled figure passed him on the Wu-Men Bridge?

"Shut your eyes tightly, master—the Scorpion is coming!"

He seemed to hear the boy's words now, as he passed along the Embankment; he seemed to see again the tall figure. And suddenly he stopped, stood still and stared with unseeing eyes across the muddy waters of the Thames. He was thinking of the cowled man who had stood behind the curtains in his study—of that figure so wildly bizarre that even now he could scarcely believe that he had ever actually seen it. He walked on.

Automatically his reflections led him to Mlle. Dorian, and he remembered that even as he paced along there beside the river the wonderful mechanism of New Scotland Yard was in motion, its many tentacles seeking—seeking tirelessly—for the girl, whose dark eyes haunted his sleeping and waking hours. He was responsible, and if she were arrested he would be called upon to identify her. He condemned himself bitterly.

After all, what crime had she committed? She had tried to purloin a letter—which did not belong to Stuart in the first place. And she had failed. Now—the police were looking for her. His reflections took a new form.

What of Gaston Max, foremost criminologist in Europe, who now lay dead and mutilated in an East-End mortuary? The telephone message which had summoned Dunbar away had been too opportune to be regarded as a mere coincidence. Mlle. Dorian was, therefore, an accomplice of a murderer.

Stuart sighed. He would have given much—more than he was prepared to admit to himself—to have known her to be guiltless.

The identity of the missing cabman now engaged his mind. It was quite possible, of course, that the man had actually found the envelope in his cab a was in no other way concerned in the matter. But how had Mlle. Dorian, or the person instructing her, traced the envelope to his study? And why, if they could establish a claim to it, had they preferred to attempt to steal it? Finally, why all this disturbance about a blank piece of cardboard?

A mental picture of the envelope arose before him, the number, 30, written upon it and the two black seals securing the lapels. He paused again in his walk. His reflections had led him to a second definite point and he fumbled in his waistcoat pocket for a time, seeking a certain brass coin about the size of a halfpenny, having a square hole in the middle and peculiar characters engraved around the square, one on each of the four sides.

He failed to find the coin in his pocket, however, but he walked briskly up a side street until he came to the entrance to a tube station. Entering a public telephone call-box, he asked for the number, City 400. Being put through and having deposited the necessary fee in the box:

"Is that the Commissioner's Office, New Scotland Yard?" he asked. "Yes! My name is Dr. Keppel Stuart. If Inspector Dunbar is there, would you kindly allow me to speak to him."

There was a short interval, then:

"Hullo!" came—"is that Dr. Stuart?"

"Yes. That you, Inspector? I have just remembered something which I should have observed in the first place if I had been really wide-awake. The envelope—you know the one I mean?—the one bearing the number, 30, has been sealed with a Chinese coin, known as cash. I have just recognized the fact and thought it wise to let you know at once."

"Are you sure?" asked Dunbar.

"Certain. If you care to call at my place later to-day I can show you some cash. Bring the envelope with you and you will see that the coins correspond to the impression in the wax. The inscriptions vary in different provinces, but the form of all cash is the same."

"Very good. Thanks for letting me know at once. It seems to establish a link with China, don't you think?"

"It does, but it merely adds to the mystery."

Coming out of the call-box, Stuart proceeded home, but made one or two professional visits before he actually returned to the house. He now remembered having left his particular cash piece (which he usually carried) in his dispensary, which satisfactorily accounted for his failure to find the coin in his waistcoat pocket. He had broken the cork of a flask, and in the absence of another of correct size had manufactured a temporary stopper with a small cork to the top of which he had fixed the Chinese coin with a drawing-pin. His purpose served he had left the extemporised stopper lying somewhere in the dispensary.

Stuart's dispensary was merely a curtained recess at one end of the waiting-room and shortly after entering the house he had occasion to visit it. Lying upon a shelf among flasks and bottles was the Chinese coin with the cork still attached. He took it up in order to study the inscription. Then:

"Have I cultivated somnambulism!" he muttered.

Fragments of black sealing-wax adhered to the coin!

Incredulous and half fearful he peered at it closely. He remembered that the impression upon the wax sealing the mysterious envelope had had a circular depression in the centre. It had been made by the head of the drawing-pin!

He found himself staring at the shelf immediately above that upon which the coin had lain. A stick of black sealing-wax used for sealing medicine was thrust in beside a bundle of long envelopes in which he was accustomed to post his Infirmary reports!

One hand raised to his head, Stuart stood endeavouring to marshal his ideas into some sane order. Then, knowing what he should find, he raised the green baize curtain hanging from the lower shelf, which concealed a sort of cupboard containing miscellaneous stores and not a little rubbish, including a number of empty cardboard boxes.

A rectangular strip had been roughly cut from the lid of the topmost box!

The mysterious envelope and its contents, the wax and the seal—all had come from his own dispensary!

CHAPTER IX

THE CHINESE COIN

Deep in reflection, Stuart walked alone along the Embankment. The full facts contained in the report form Paris the Commissioner had not divulged, but Stuart concluded that this sudden activity was directly due, not to the death of M. Max, but to the fact that he (Max) had left behind him some more or less tangible clue. Stuart fully recognized that the Commissioner had accorded him an opportunity to establish his reputation—or to wreck it.

Yet, upon closer consideration, it became apparent that it was to Fate and not to the Commissioner that he was indebted. Strictly speaking, his association with the matter dated from the night of his meeting with the mysterious cabman in West India Dock Road. Or had the curtain first been lifted upon this occult drama that evening, five years ago, as the setting sun reddened the waters of the Imperial Canal and a veiled figure passed him on the Wu-Men Bridge?

"Shut your eyes tightly, master—the Scorpion is coming!"

He seemed to hear the boy's words now, as he passed along the Embankment; he seemed to see again the tall figure. And suddenly he stopped, stood still and stared with unseeing eyes across the muddy waters of the Thames. He was thinking of the cowled man who had stood behind the curtains in his study—of that figure so wildly bizarre that even now he could scarcely believe that he had ever actually seen it. He walked on.

Automatically his reflections led him to Mlle. Dorian, and he remembered that even as he paced along there beside the river the wonderful mechanism of New Scotland Yard was in motion, its many tentacles seeking—seeking tirelessly—for the girl, whose dark eyes haunted his sleeping and waking hours. He was responsible, and if she were arrested he would be called upon to identify her. He condemned himself bitterly.

After all, what crime had she committed? She had tried to purloin a letter—which did not belong to Stuart in the first place. And she had failed. Now—the police were looking for her. His reflections took a new form.

What of Gaston Max, foremost criminologist in Europe, who now lay dead and mutilated in an East-End mortuary? The telephone message which had summoned Dunbar away had been too opportune to be regarded as a mere coincidence. Mlle. Dorian was, therefore, an accomplice of a murderer.

Stuart sighed. He would have given much—more than he was prepared to admit to himself—to have known her to be guiltless.

The identity of the missing cabman now engaged his mind. It was quite possible, of course, that the man had actually found the envelope in his cab and was in no other way concerned in the matter. But how had Mlle. Dorian, or the person instructing her, traced the envelope to his study? And why, if they could establish a claim to it, had they preferred to attempt to steal it? Finally, why all this disturbance about a blank pieced of cardboard?

A mental picture of the envelope arose before him, the number, 30, written upon it and the two black seals securing the lapels. He paused again in his walk. His reflections had led him to a second definite point and he fumbled in his waistcoat pocket for a time, seeking a certain brass coin about the size of a halfpenny, having a square hole in the middle and peculiar characters engraved around the square, one on each of the four sides.

He failed to find the coin in his pocket, however, but he walked briskly up a side street until he came to the entrance to a tube station. Entering a public telephone call-box, he asked for the number, City 400. Being put through and having deposited the necessary fee in the box:

"Is that the Commissioner's Office, New Scotland Yard?" he asked. "Yes! My name is Dr. Keppel Stuart. If Inspector Dunbar is there, would you kindly allow me to speak to him."

There was a short interval, then:

"Hullo!" came—"is that Dr. Stuart?"

"Yes. That you, Inspector? I have just remembered something which I should have observed in the first place if I had been really wide-awake. The envelope—you know the one I mean?—the one bearing the number, 30, has been sealed with a Chinese coin, known as cash. I have just recognized the fact and thought it wise to let you know at once."

"Are you sure?" asked Dunbar.

"Certain. If you care to call at my place later to-day I can show you some cash. Bring the envelope with you and you will see that the coins correspond to the impression in the wax. The inscriptions vary in different provinces, but the form of all cash is the same."

"Very good. Thanks for letting me know at once. It seems to establish a link with China, don't you think?"

"It does, but it merely adds to the mystery."

Coming out of the call-box, Stuart proceeded home, but made one or two professional visits before he actually returned to the house. He now remembered having left this particular cash piece (which he usually carried) in his dispensary, which satisfactorily accounted fro his failure to find the coin in his waistcoat pocket. He had broken the cork of a flask, and in the absence of another of correct size had manufactured a temporary stopper with a small cork to the top of which he had fixed the Chinese coin with a drawing-pin. His purpose served he had left the extemporized stopper somewhere in the dispensary.

Stuart's dispensary was merely a curtained recess at one end of the waiting-room and shortly after entering the house he had occasion to visit it. Lying upon a shelf among flasks and bottles was the Chinese coin with the cork still attached. He took it up in order to study the inscription. Then:

"Have I cultivated somnambulism!" he muttered.

Fragments of black sealing-wax adhered to the coin!

Incredulous and half fearful he peered at it closely. He remembered that the impression upon the wax sealing the mysterious envelope had had a circular depression in the centre. It had been made by the head of the drawing-pin!

He found himself at the shelf immediately above that upon which the coin had lain. A stick of black sealing wax used for sealing medicine was thrust in beside a bundle of long envelopes in which he was accustomed to post his Infirmary reports!

One hand raised to his head, Stuart stood endeavouring to marshal his ideas into some sane order. Then, knowing what he should find, he raised the green baize curtain hanging from the lower shelf, which concealed a sort of cupboard containing miscellaneous stores and not a little rubbish, including a number of empty cardboard boxes.

A rectangular strip had been roughly cut from the lid of the topmost box!

The mysterious envelope and its contents, the wax and the seal—all had come from his own dispensary!

CHAPTER X

"CLOSE YOUR SHUTTERS AT NIGHT"

Inspector Dunbar stood in the little dispensary tapping his teeth with the end of a fountain-pen.

"The last time he visited you, doctor—the time when he gave you the envelope—did the cabman wait here in the waiting-room?"

"He did—yes. He came after my ordinary consulting hours and I was at supper, I remember, as I am compelled to dine early."

"He would be in here alone?"

"Yes. No one else was in the room."

"Would he have had time to find the box, cut out the piece of cardboard from the lid, put it in the envelope and seal it?"

"Ample time. But what could be his object? And why mark the envelope 30?"

"It was in your consulting-room that he asked you to take charge of the envelope?"

"Yes."

"Might I take a peep at the consulting room?"

"Certainly, Inspector."

From the waiting-room they went up a short flight of stairs into the small apartment in which Stuart saw his patients. Dunbar looked slowly about him, standing in the middle of the room, then crossed and stared out of the window into the narrow lane below.

"Where were you when he gave you the envelope?" he snapped suddenly.

"At the table," replied Stuart with surprise.

"Was the table-lamp alight?"

"Yes. I always light it when seeing patients."

"Did you take the letter into the study to seal it in the other envelope?"

"I did, and he came along and witnessed me do it."

"Ah," said Dunbar, and scribbled busily in his note-book. "We are badly tied at Scotland Yard, doctor, and this case looks like being another for which somebody else will reap the credit. I am going to make a request that will surprise you."

He tore a leaf out of the book and folded it carefully.

"I am going to ask you to seal up something and lock it away! But I don't think you'll be troubled by cowled burglars or beautiful women because of it. On this piece of paper I have written—a"—he ticked off the points on his fingers: "what I believe to be the name of the man who cut out the cardboard and sealed it in an envelope; b: the name of the cabman; and, c: the name of the man who rang me up here last night and gave me information which had only just reached the Commissioner. I'll ask you to lock it away until it's wanted, doctor."

"Certainly, if you wish it," replied Stuart. "Come into the study and you shall see me do as you direct. I may add that the object to be served is not apparent to me."

Entering the study, he took an envelope, enclosed the piece of paper, sealed the lapel and locked the envelope in the same drawer of the bureau which once had contained that marked 30.

"Mlle. Dorian has a duplicate key to this drawer." he said. "Are you prepared to take the chance?"

"Quite," replied Dunbar, smiling; "although my information is worth more than that which she risked so much to steal."

"It's most astounding. At every step the darkness increases. Why should anyone have asked me to lock up a blank piece of cardboard?"

"Why, indeed," murmured Dunbar. "Well, I may as well get back. I am expecting a report from Sowerby. Look after yourself, sir. I'm inclined to think your pretty patient was talking square when she told you there might be danger."

Stuart met the glance of the tawny eyes.

"What d'you mean, Inspector? Why should I be in danger?"

"Because," replied Inspector Dunbar, "if 'The Scorpion' is a poisoner, as the chief seems to think, there's really only one man in England he has to fear, and that man is Dr. Keppel Stuart."

When the Inspector had taken his departure Stuart stood for a long time staring out of the study window at the little lawn with its bordering of high neatly-trimmed privet above which at intervals arose the mop crowns of dwarf acacias. A spell of warm weather seemed at last to have begun, and clouds of gnats floated over the grass, their minute wings glittering in the sunshine. Despite the nearness of teeming streets, this was a backwater of London's stream.

He sighed and returned to some work which the visit of the Scotland
Yard man had interrupted.

Later in the afternoon he had occasion to visit the institution to which he had recently been appointed as medical officer, and in contemplation of the squalor through which his steps led him he sought forgetfulness of the Scorpion problem—and of the dark eyes of Mlle. Dorian. He was not entirely successful, and returning by a different route he lost himself in memories which were sweetly mournful.

A taxicab passed him, moving slowly very close to the pavement. He scarcely noted it until it had proceeded some distance ahead of him. Then its slow progress so near to the pavement at last attracted his attention, and he stared vacantly towards the closed vehicle.

Mlle. Dorian was leaning out of the window and looking back at him!

Stuart's heart leapt high. For an instant he paused, then began to walk rapidly after the retreating vehicle. Perceiving that she had attracted his attention, the girl extended a white-gloved hand from the window and dropped a note upon the edge of the pavement. Immediately she withdrew into the vehicle—which moved away at accelerated speed, swung around the next corner and was gone.

Stuart ran forward and picked up the note. Without pausing to read it, he pressed on to the corner. The cab was already two hundred yards away, and he recognized pursuit to be out of the question. The streets were almost deserted at the moment, and no one apparently had witnessed the episode. He unfolded the sheet of plain note-paper, faintly perfumed with jasmine, and read the following, written in an uneven feminine hand:

"Close your shutters at night. Do not think too bad of me."

CHAPTER XI

THE BLUE RAY

Dusk found Stuart in a singular frame of mind. He was torn between duty—or what he conceived to be his duty—to the community, and … something else. A messenger from New Scotland Yard had brought him a bundle of documents relating to the case of Sir Frank Narcombe, and a smaller packet touching upon the sudden end of Henrik Ericksen, the Norwegian electrician, and the equally unexpected death of the Grand Duke Ivan. There were medical certificates, proceedings of coroners, reports of detectives, evidence of specialists and statements of friends, relatives and servants of the deceased. A proper examination of all the documents represented many hours of close study.

Stuart was flattered by the opinion held of his ability by the Assistant Commissioner, but dubious of his chance of detecting any flaw in the evidence which had escaped the scrutiny of so many highly trained observers.

He paced the study restlessly. Although more than six hours had elapsed, he had not communicated to Scotland Yard the fact of his having seen Mlle. Dorian that afternoon. A hundred times he had read the message, although he knew it by heart, knew the form of every letter, the odd crossing of the _t'_s and the splashy dotting of the i's.

If only he could have taken counsel with someone—with someone not bound to act upon such information—it would have relieved his mental stress. His ideas were so chaotic that he felt himself to be incapable of approaching the task presented by the pile of papers lying upon his table.

The night was pleasantly warm and the sky cloudless. Often enough he found himself glancing toward the opened French windows, and once he had peered closely across into the belt of shadow below the hedge, thinking that he had detected something which moved there. Stepping to the window, the slinking shape had emerged into the moonlight—and had proclaimed itself to be that of a black cat!

Yet he had been sorely tempted to act upon the advice so strangely offered. He refrained from doing so, however, reflecting that to spend his evenings with closed and barred shutters now that a spell of hot weather seemed to be imminent would be insufferable. Up and down the room he paced tirelessly, always confronted by the eternal problem.

Forcing himself at last to begin work if only as a sedative, he filled and lighted his pipe, turned off the centre lamp and lighted the reading lamp upon his table. He sat down to consider the papers bearing upon the death of Eriksen. For half an hour he read on steadily and made a number of pencil notes. Then he desisted and sat staring straight before him.

What possible motive could there be in assassinating these people? The case of the Grand Duke might be susceptible of explanation, but those of Henrik Ericksen and Sir Frank Narcombe were not. Furthermore he could perceive no links connecting the three, and no reason why they should have engaged the attention of a common enemy. Such crimes would seem to be purposeless. Assuming that "The Scorpion" was an individual, that individual apparently was a dangerous homicidal maniac.

But, throughout the documents, he could discover no clue pointing to the existence of such an entity. "The Scorpion" might be an invention of the fertile brain of M. Gaston Max; for it had become more and more evident, as he had read, that the attempt to trace these deaths to an identical source had originated at the Service de Surete, and it was from Paris that the name "The Scorpion" had come. The fate of Max was significant, of course. The chances of his death proving to have been due to accident were almost negligible and the fact that a fragment of a golden scorpion had actually been found upon his body was certainly curious.

"Close your shutters at night…."

How the words haunted him and how hotly he despised himself for a growing apprehension which refused to be ignored. It was more mental than physical, this dread which grew with the approach of midnight, and it resembled that which had robbed him of individuality and all but stricken him inert when he had seen upon the moon-bright screen of the curtains the shadow of a cowled man.

Dark forces seemed to be stirring, and some unseen menace crept near to him out of the darkness.

The house was of early Victorian fashion and massive folding shutters were provided to close the French windows. He never used them, as a matter of fact, but now he tested the fastenings which kept them in place against the inner wall and even moved them in order to learn if they were still serviceable.

Of all the mysteries which baffled him, that of the piece of cardboard in the envelope sealed with a Chinese coin was the most irritating. It seemed like the purposeless trick of a child, yet it had led to the presence of the cowled man—and to the presence of Mlle. Dorian. Why?

He sat down at his table again.

"Damn the whole business!" he said. "It is sending me crazy."

Selecting from the heap of documents a large sheet of note-paper bearing a blue diagram of a human bust, marked with figures and marginal notes, he began to read the report to which it was appended—that of Dr. Halesowen. It stated that the late Sir Frank Narcombe had a "horizontal" heart, slightly misplaced and dilatated, with other details which really threw no light whatever upon the cause of his death.

"I have a horizontal heart," growled Stuart—"and considering my consumption of tobacco it is certainly dilatated. But I don't expect to drop dead in a theatre nevertheless."

He read on, striving to escape from that shadowy apprehension, but as he read he was listening to the night sounds of London, to the whirring of distant motors, the whistling of engines upon the railway and dim hooting of sirens from the Thames. A slight breeze had arisen and it rustled in the feathery foliage of the acacias and made a whispering sound as it stirred the leaves of the privet hedge.

The drone of an approaching car reached his ears. Pencil in hand, he sat listening. The sound grew louder, then ceased. Either the car had passed or had stopped somewhere near the house. Came a rap on the door.

"Yes," called Stuart and stood up, conscious of excitement.

Mrs. M'Gregor came in.

"There is nothing further you'll be wanting to-night?" she asked.

"No," said Stuart, strangely disappointed, but smiling at the old lady cheerfully. "I shall turn in very shortly."

"A keen east wind has arisen," she continued, severely eyeing the opened windows, "and even for a medical man you are strangely imprudent. Shall I shut the windows?"

"No, don't trouble, Mrs. M'Gregor. The room gets very stuffy with tobacco smoke, and really it is quite a warm night. I shall close them before I retire, of course."

"Ah well," sighed Mrs. M'Gregor, preparing to depart. "Good-night,
Mr. Keppel."

"Good-night, Mrs. M'Gregor."

She retired, and Stuart sat staring out into the darkness. He was not prone to superstition, but it seemed like tempting providence to remain there with the windows open any longer. Yet paradoxically, he lacked the moral courage to close them—to admit to himself that he was afraid!

The telephone bell rang, and he started back in his chair as though to avoid a blow.

By doing so he avoided destruction.

At the very instant that the bell rang out sharply in the silence—so exact is the time-table of Kismet—a needle-like ray of blue light shot across the lawn from beyond and above the hedge and—but for that nervous start—must have struck fully upon the back of Stuart's skull. Instead, it shone past his head, which it missed only by inches, and he experienced a sensation as though some one had buffeted him upon the cheek furiously. He pitched out of his chair and on to the carpet.

The first object which the ray touched was the telephone; and next, beyond it, a medical dictionary; beyond that again, the grate, in which a fire was laid.

"My God!" groaned Stuart—"what is it!"

An intense crackling sound deafened him, and the air of the room seemed to have become hot as that of an oven. There came a series of dull reports—an uncanny wailing … and the needle-ray vanished. A monstrous shadow, moon-cast, which had lain across the carpet of the lawn—the shadow of a cowled man—vanished also.

Clutching the side of his head, which throbbed and tingled as though from the blow of an open hand, Stuart struggled to his feet. There was smoke in the room, a smell of burning and of fusing metal. He glared at the table madly.

The mouthpiece of the telephone had vanished!

"My God!" he groaned again, and clutched at the back of the chair.

His dictionary was smouldering slowly. It had a neat round hole some three inches in diameter, bored completely through, cover to cover! The fire in the grate was flaring up the chimney!

He heard the purr of a motor in the lane beside the house. The room was laden with suffocating fumes. Stuart stood clutching the chair and striving to retain composure—sanity. The car moved out of the lane.

Someone was running towards the back gate of the house … was scrambling over the hedge … was racing across the lawn!

A man burst into the study. He was a man of somewhat heavy build, clean-shaven and inclined to pallor. The hirsute blue tinge about his lips and jaw lent added vigour to a flexible but masterful mouth. His dark hair was tinged with grey, his dark eyes were brilliant with excitement. He was very smartly dressed and wore light tan gloves. He reeled suddenly, clutching at a chair for support.

"Quick! quick!" he cried—"the telephone! … Ah!"

Just inside the window he stood, swaying and breathing rapidly, his gaze upon the instrument.

"Mon Dieu!" he cried—"what has happened, then!"

Stuart stared at the new-comer dazedly.

"Hell has been in my room!" he replied. "That's all!"

"Ah!" said the stranger—"again he eludes me! The telephone was the only chance. Pas d'blaque! we are finished!"

He dropped into a chair, removed his light grey hat and began to dry his moist brow with a fine silk handkerchief. Stuart stared at him like a man who is stupefied. The room was still laden with strange fumes.

"Blimey!" remarked the new-comer, and his Whitechapel was as perfect as his Montmatre. He was looking at the decapitated telephone. "This is a knock-out!"

"Might I ask," said Stuart, endeavouring to collect his scattered senses, "where you came from?"

"From up a tree!" was the astonishing reply. "It was the only way to get over!"

"Up a tree!"

"Exactly. Yes, I was foolish. I am too heavy. But what could I do!
We must begin all over again."

Stuart began to doubt his sanity. This was no ordinary man.

"Might I ask," he said, "who you are and what you are doing in my house?"

"Ah!" The stranger laughed merrily. "You wonder about me—I can see it. Permit me to present myself—Gaston Max, at your service!"

"Gaston Max!" Stuart glared at the speaker incredulously. "Gaston Max! Why, I conduct a post mortem examination upon Gaston Max tomorrow, in order to learn if he was poisoned!"

"Do not trouble, doctor. That poor fellow is not Gaston Max and he was not poisoned. You may accept my word for it. I had the misfortune to strangle him."

PART II

STATEMENT OF GASTON MAX

I. THE DANCER OF MONTMARTRE

CHAPTER I

ZARA EL-KHALA

The following statement which I, Gaston Max, am drawing up in duplicate for the guidance of whoever may inherit the task of tracing "The Scorpion"—a task which I have begun—will be lodged—one copy at the Service de Surete in Paris, and the other copy with the Commissioner of Police, New Scotland Yard. As I apprehend that I may be assassinated at any time, I propose to put upon record all that I have learned concerning the series of murders which I believe to be traceable to a certain person. In the event of my death, my French colleagues will open the sealed packet containing this statement and the English Assistant Commissioner of the Special Branch responsible for international affairs will receive instructions to open that which I shall have lodged at Scotland Yard.

This matter properly commenced, then, with the visit to Paris, incognito, of the Grand Duke Ivan, that famous soldier of whom so much was expected, and because I had made myself responsible for his safety during the time that he remained in the French capital, I (also incognito be it understood) struck up a friendship with one Casimir, the Grand Duke's valet. Nothing is sacred to a valet, and from Casimir I counted upon learning the real reason which had led this nobleman to visit Paris at so troublous a time. Knowing the Grand Duke to be a man of gallantry, I anticipated finding a woman in the case—and I was not wrong.

Yes, there was a woman, and _nom d'nom!_she was beautiful. Now in Paris we have many beautiful women, and in times of international strife it is true that we have had to shoot some of them. For my own part I say with joy that I have never been instrumental in bringing a woman to such an end. Perhaps I am sentimental; it is a French weakness; but on those few occasions when I have found a guilty woman in my power—and she has been pretty— morbleu!—she has escaped! It may be that I have seen to it that she was kept out of further mischief, but nevertheless she has never met a firing-party because of me. Very well.

From the good fellow Casimir I learned that a certain dancer appearing at one of our Montmartre theatres had written to the Grand Duke craving the honour of his autograph—and enclosing her photograph.

Pf! it was enough. One week later the autograph arrived—attached to an invitation to dine with the Grand Duke at his hotel in Paris. Yes—he had come to Paris. I have said that he was susceptible and I have said that she was beautiful. I address myself to men of the world, and I shall not be in error if I assume that they will say, "A wealthy fool and a designing woman. It is an old story." Let us see.

The confidences of Casimir interested me in more ways than one. In the first place I had particular reasons for suspecting anyone who sought to obtain access to the Grand Duke. These were diplomatic. And in the second place I had suspicions of Zara el-Khala. These were personal.

Yes—so she called herself—Zara el-Khala, which in Arabic is "Flower of the Desert." She professed to be an Egyptian, and certainly she had the long, almond-shaped eyes of the East, but her white skin betrayed her, and I knew that whilst she might possess Eastern blood, she was more nearly allied to Europe than to Africa. It is my business to note unusual matters, you understand, and I noticed that this beautiful and accomplished woman of whom all Paris was beginning to speak rapturously remained for many weeks at a small Montmartre theatre. Her performance, which was unusually decorous for the type of establishment at which she appeared, had not apparently led to an engagement elsewhere.

This aroused the suspicions to which I have referred. In the character of a vaudeville agent I called at the Montmartre theatre and was informed by the management that Zara-el-Khala received no visitors, professional or otherwise. A small but expensive car awaited her at the stage door. My suspicions increased. I went away, but returned on the following night, otherwise attired, and from a hiding-place which I had selected on the previous evening I watched the dancer depart.

She came out so enveloped in furs and veils as to be unrecognizable, and a Hindu wearing a chauffeur's uniform opened the door of the car for her, and then, having arranged the rugs to her satisfaction, mounted to the wheel and drove away.

I traced the car. It had been hired for the purpose of taking Zara el-Khala from her hotel—to the theatre and home nightly. I sent a man to call upon her at the hotel—in order to obtain press material, ostensibly. She declined to see him. I became really interested. I sent her a choice bouquet, having the card of a nobleman attached to it, together with a message of respectful admiration. It was returned. I prevailed upon one of the most handsome and gallant cavalry officers in Paris to endeavour to make her acquaintance. He was rebuffed.

Eh bien! I knew then that Mlle. Zara of the Desert was unusual.

You will at once perceive that when I heard from the worthy Casimir how this unapproachable lady had actually written to the Grand Duke Ivan and had gone so far as to send him her photograph, I became excited. It appeared to me that I found myself upon the brink of an important discovery. I set six of my first-class men at work: three being detailed to watch the hotel of the Grand Duke Ivan and three to watch Zara el-Khala. Two more were employed in watching the Hindu servant and one in watching my good friend Casimir. Thus, nine clever men and myself were immediately engaged upon the case.

Why do I speak of a "case" when thus far nothing of apparent importance had occurred? I will explain. Although the Grand Duke travelled incognito, his Government knew of the journey and wished to learn with what object it had been undertaken.

At the time that I made the acquaintance of Casimir the Grand Duke had been in Paris for three days, and he was—according to my informant—"like a raging lion." The charming dancer had vouchsafed no reply to his invitation and he had met with the same reception, on presenting himself in person, which had been accorded to myself and to those others who had sought to obtain an interview with Zara el-Khala!

My state of mystification grew more and more profound. I studied the reports of my nine assistants.

It appeared that the girl had been in Paris for a period of two months. She occupied a suite of rooms in which all her meals were served. Except the Hindu who drove the hired car, she had no servant. She never appeared in the public part of the hotel unless veiled, and then merely in order to pass out to the car or in from it on returning. She drove out every day. She had been followed, of course, but her proceedings were unexceptionable. Leaving the car at a point in the Bois De Boulogne, she would take a short walk, if the day was fine enough, never proceeding out of sight of the Hindu, who followed with the automobile, and would then drive back to her hotel. She never received visits and never met any one during these daily excursions.

I turned to the report dealing with the Hindu. He had hired a room high up under the roof of an apartment house where foreign waiters and others had their abodes. He bought and cooked his own food, which apparently consisted solely of rice, lentils and fruit. He went every morning to the garage and attended to the car, called for his mistress, and having returned remained until evening in his own apartment. At night, after returning from the theatre, he sometimes went out, and my agent had failed to keep track of him on every occasion that he had attempted pursuit. I detached the man who was watching Casimir and whose excellent reports revealed the fact that Casimir was an honest fellow—as valets go—and instructed him to assist in tracing the movements of the Hindu.

Two nights later they tracked him to a riverside cafe kept by a gigantic quadroon from Dominique and patronized by that type which forms a link between the lowest commercial and the criminal classes: itinerant vendors of Eastern rugs, street performers and Turkish cigarette makers.

At last I began to have hopes. The Grand Duke at this time was speaking of leaving Paris, but as he had found temporary consolation in the smiles of a lady engaged at the "Folies" I did not anticipate that he would depart for several days at any rate. Also he was the kind of man who is stimulated by obstacles.

The Hindu remained for an hour in the cafe, smoking and drinking some kind of syrup, and one of my fellows watched him. Presently the proprietor called him into a little room behind the counter and closed the door. The Hindu and the quadroon remained there for a few minutes, then the Hindu came out and left the cafe, returning to his abode. There was a telephone in this inner room, and my agent was of opinion that the Indian had entered either to make or to receive a call. I caused the line to be tapped.

On the following night the Hindu came back to the cafe, followed by one of my men. I posted myself at a selected point and listened for any message that might pass over the line to or from the cafe. At about the same hour as before—according to the report—someone called up the establishment, asking for "Miguel." This was the quadroon, and I heard his thick voice replying. The other voice—which had first spoken—was curiously sibilant but very distinct. Yet it did not sound like the voice of a Frenchman or of any European. This was the conversation:

"Miguel."

"Miguel speaks."

"Scorpion. A message for Chunda Lal."

"Very good."

Almost holding my breath, so intense was my excitement, I waited whilst Miguel went to bring the Hindu. Suddenly a new voice spoke—that of the Hindu.

"Chunda Lal speaks," it said.

I clenched by teeth; I knew that I must not miss a syllable.

"Scorpion" replied … in voluble Hindustani—a language of which I know less than a dozen words!

CHAPTER II

CONCERNING THE GRAND DUKE

Although I had met with an unforeseen check, I had nevertheless learned three things. I had learned that Miguel the quadroon was possibly in league with the Hindu; that the Hindu was called Chunda Lal; and that Chunda Lal received messages, probably instructions, from a third party who announced his presence by the word "Scorpion."

One of my fellows, of course, had been in the cafe all the evening, and from him I obtained confirmation of the fact that it had been the Hindu who had been summoned to the telephone and whom I had heard speaking. Instant upon the man at the cafe replacing the telephone and disconnecting, I called up the exchange. They had been warned and were in readiness.

"From what subscriber did that call come?" I demanded.

Alas! another check awaited me. It had originated in a public call office, and "Scorpion" was untraceable by this means!

Despair is not permitted by the traditions of the Service de Surete. Therefore I returned to my flat and recorded the facts of the matter thus far established. I perceived that I had to deal, not with a designing woman, but with some shadowy being of whom she was an instrument. The anomaly of her life was in a measure explained. She sojourned in Paris for a purpose—a mysterious purpose which was concerned (I could not doubt it) with the Grand Duke Ivan. This was not an amorous but a political intrigue.

I communicated, at a late hour, with the senior of the three men watching the Grand Duke. The Grand Duke that evening had sent a handsome piece of jewellery purchased in Rue de la Paix to the dancer. It had been returned.

In the morning I met with the good Casimir at his favorite cafe. He had just discovered that Zara el-Khala drove daily to the Bois de Boulogne, alone, and that afternoon the Grand Duke had determined to accost her during her solitary walk. I prepared myself for this event. Arrayed in a workman's blouse and having a modest luncheon and a small bottle of wine in a basket, I concealed myself in that part of the Bois which was the favourite recreation ground of the dancer, and awaited her appearance.

The Grand Duke appeared first upon the scene, accompanied by Casimir. The latter pointed out to him a path through the trees along which Zara el-Khala habitually strolled and showed him the point at which she usually rejoined the Hindu who followed along the road with the car. They retired. I seated myself beneath a tree from whence I could watch the path and the road and began to partake of the repast which I had brought with me.

At about three o'clock the dancer's car appeared, and the girl, veiled as usual, stepped out, and having exchanged a few words with the Indian, began to walk slowly towards me, sometimes pausing to watch a bird in the boughs above her and sometimes to examine some wild plant growing beside the way. I ate cheese from the point of a clasp-knife and drank wine out of the bottle.

Suddenly she saw me.

She had cast her veil aside in order to enjoy the cool and fragrant air, and as she stopped and regarded me doubtfully where I sat, I saw her beautiful face, undefiled, now, by make-up and unspoiled by the presence of garish Eastern ornaments. Nom d'un nom! but she was truly a lovely woman! My heart went out in sympathy to the poor Grand Duke. Had I received such a mark of favour from her as he had received, and had I then been scorned as now she scorned him, I should have been desperate indeed.

Coming around a bend in the path, then, she stood only a few paces away, looking at me. I touched the peak of my cap.

"Good-day, mademoiselle," I said. "The weather is very beautiful."

"Good-day," she replied.

I continued to eat cheese, and reassured she walked on past me. Twenty yards beyond, the Grand Duke was waiting. As I laid down my knife upon the paper which had been wrapped around the bread and cheese, and raised the bottle to my lips, the enamoured nobleman stepped out from the trees and bowed low before Zara el-Khala.

She started back from him—a movement of inimitable grace, like that of a startled gazelle. And even before I had time to get upon my feet she had raised a little silver whistle to her lips and blown a short shrill note.

The Grand Duke, endeavouring to seize her hand, was pouring out voluble expressions of adoration in execrable French, and Zara el-Khala was retreating step by step. She had quickly thrown the veil about her again. I heard the pad of swiftly running feet. If I was to intervene before the arrival of the Hindu, I must act rapidly. I raced along the path and thrust myself between the Grand Duke and the girl.

"Mademoiselle," I said, "is this gentleman annoying you?"

"How dare you, low pig!" cried the Grand Duke, and with a sweep of his powerful arm he hurled me aside.

"Thank you," replied Zara el-Khala with great composure. "But my servant is here."

As I turned, Chunda Lal hurled himself upon the Grand Duke from behind. I had never seen an expression in a man's eyes like that in the eyes of the Hindu at this moment. They blazed like the eyes of a tiger, and his teeth were bared in a savage grin which I cannot hope to describe. His lean body seemed to shoot through the air, and he descended upon his burly adversary as a jungle beast falls upon its prey. Those long brown fingers clasping his neck, the Grand Duke fell forward upon his face.

"Chunda Lal!" said the dancer.

Kneeling, his right knee thrust between the shoulder blades of the prostrate man, the Hindu looked up—and I read murder in those glaring eyes. That he was an accomplished wrestler—or perhaps a strangler—I divined from the helplessness of the Grand Duke, who lay inert, robbed of every power except that of his tongue. He was swearing savagely.

"Chunda Lal!" said Zara el-Khala again. The Hindu shifted his grip from the neck to the arms of the Grand Duke. He pinioned him as is done in jiu-jitsu and forced him to stand upright. It was a curious spectacle—the impotency of this burly nobleman in the hands of his slight adversary. As they swayed to their feet, I thought I saw the glint of metal in the right hand of the Indian, but I could not be sure, for my attention was diverted. At this moment Casimir appeared upon the scene, looking very frightened.

Suddenly releasing his hold altogether, the Hindu glaring into the empurpled face of the Grand Duke, shot out one arm and pointed with a quivering finger along the path.

"Go!" he said.

The Grand Duke clenched his fists, looked from face to face as if calculating his chances, then shrugged his shoulders, very deliberately wiped his neck and wrists, where the Indian had held him, with a large silk handkerchief and threw the handkerchief on the ground. I saw a speck of blood upon the silk. Without another glance he walked away, Casimir following sheepishly. It is needless, perhaps, to add that Casimir had not recognized me.

I turned to the dancer, touching the peak of my cap.

"Can I be of any assistance to mademoiselle?" I asked.

"Thank you—no," she replied.

She placed five francs in my hand and set off rapidly through the trees in the direction of the road, her bloodthirsty but faithful attendant at her heels!

I stood scratching my head and looking after her.

That afternoon I posted a man acquainted with Hindustani to tap any message which might be sent to or from the cafe used by Chunda Lal. I learned that the Grand Duke had taken a stage box at the Montmartre theatre at which the dancer was appearing, and I decided that I would be present also.

A great surprise was in store for me.

Zara el-Khala had at this time established a reputation which extended beyond those circles from which the regular patrons of this establishment were exclusively drawn and which had begun to penetrate to all parts of Paris. You will remember that it was the extraordinary circumstance of her remaining at this obscure place of entertainment so long which had first interested me in the lady. I had learned that she had rejected a number of professional offers, and, as I have already stated, I had assured myself of this unusual attitude by presenting the card of a well-known Paris agency—and being refused admittance.

Now, as I leaned upon the rail at the back of the auditorium and the time for the dancer's appearance grew near, I could not fail to observe that there was a sprinkling of evening-dress in the stalls and that the two boxes already occupied boasted the presence of parties of well-known men of fashion. Then the Grand Duke entered as a troupe of acrobats finished their performance. Zara el-Khala was next upon the programme. I glanced at the Grand Duke and thought that he looked pale and unwell.

The tableau curtain fell and the manager appeared behind the footlights.
He, also, seemed to be much perturbed.

"Ladies and gentlemen," he said, "I greatly regret to announce that Mlle. Zara el-Kahla is indisposed and unable to appear. We have succeeded in obtaining the services——"

Of whom he had succeeded in obtaining the services I never heard, for the rougher section of the audience rose at him like a menacing wave! They had come to see the Egyptian dancer and they would have their money back! It was a swindle; they would smash the theatre!

If one had doubted the great and growing popularity of Zara el-Kahla, this demonstration must have proved convincing. Over the heads of the excited audience, I saw the Grand Duke rise as if to retire. The other box parties were also standing up and talking angrily.

"Why was it not announced outside the theatre?" someone shouted. "We did not know until twenty minutes ago!" cried the manager in accents of despair.

I hurried from the theatre and took a taxicab to the hotel of the dancer. Running into the hall, I thrust a card in the hand of a concierge who stood there.

"Announce to Mlle. Zara el-Khala that I must see her at once," I said.

The man smiled and returned the card to me.

"Mlle. Zara el-Khala left Paris at seven o'clock, monsieur!"

"What! I cried—left Paris!"

"But certainly. Her baskets were taken to the Gare du Nord an hour earlier by her servant and she went off by the seven-fifty rapid for Calais. The theatre people were here asking for her an hour ago."

I hurried to my office to obtain the latest reports of my men, I had lost touch with them, you understand, during the latter part of the afternoon and evening. I found there the utmost confusion. They had been seeking me all over Paris to inform me that Zara el-Khala had left. Two men had followed her and had telephoned from Calais for instructions. She had crossed by the night mail for Dover. It was already too late to instruct the English police.

For a few hours I had relaxed my usual vigilance—and this was the result. What could I do? Zara el-Khala had committed no crime, but her sudden flight—for it looked like flight you will agree—was highly suspicious. And as I sat there in my office filled with all sorts of misgivings, in ran one of the men engaged in watching the Grand Duke.

The Grand Duke had been seized with illness as he left his box in the
Montmartre theatre and had died before his car could reach the hotel!

CHAPTER III

A STRANGE QUESTION

A conviction burst upon my mind that a frightful crime had been committed. By whom and for what purpose I knew not. I hastened to the hotel of the Grand Duke. Tremendous excitement prevailed there, of course. There is no more certain way for a great personage to court publicity than to travel incognito. Everywhere that "M. de Stahler" had appeared all Paris had cried, "There goes the Grand Duke Ivan!" And now as I entered the hotel, press, police and public were demanding: "Is it true that the Grand Duke is dead?" Just emerging from the lift I saw Casimir. In propria persona—as M. Max—he failed to recognize me.

"My good man," I said—"are you a member of the suite of the late
Grand Duke?"

"I am, or was, the valet of M. de Stahler, monsieur," he replied.

I showed him my card.

"To me 'M. de Stahler' is the Grand Duke Ivan. What other servants had he with him?" I asked, although I knew very well.

"None, monsieur."

"Where and when was he taken ill?"

"At the Theatre Coquerico. Montmartre, at about a quarter past ten o'clock to-night."

"Who was with him?"

"No one, monsieur. His Highness was alone in a box. I had instructions to call with the car at eleven o'clock."

"Well?"

"The theatre management telephoned at a quarter past ten to say that His Highness had been taken ill and that a physician had been sent for. I went in the car at once and found him lying in one of the dressing-rooms to which he had been carried. A medical man was in attendance. The Grand Duke was unconscious. We moved him to the car——"

"We?"

"The doctor, the theatre manager, and myself. The Grand Duke was then alive, the physician declared, although he seemed to me to be already dead. But just before we reached the hotel, the physician, who was watching His Highness anxiously, cried, 'Ah,mon Dieu! It is finished. What a catastrophe!'"

"He was dead?"

"He was dead, monsieur."

"Who has seen him?"

"They have telephoned for half the doctors in Paris, monsieur, but it is too late."

He was affected, the good Casimir. Tears welled up in his eyes. I mounted in the lift to the apartment in which the Grand Duke lay. Three doctors were there, one of them being he of whom Casimir had spoken. Consternation was written on every face.

"It was his heart," I was assured by the doctor who had been summoned to the theatre. "We shall find that he suffered from heart trouble."

They were all agreed upon the point.

"He must have sustained a great emotional shock," said another.

"You are convinced that there was no foul play, gentlemen?" I asked.

They were quite unanimous on the point.

"Did the Grand Duke make any statement at the time of the seizure which would confirm the theory of a heart attack?"

No. He had fallen down unconscious outside the door of his box, and from this unconsciousness he had never recovered. (Depositions of witnesses, medical evidence and other documents are available for the guidance of whoever may care to see them, but, as is well known, the death of the Grand Duke was ascribed to natural causes and it seemed as though my trouble would after all prove to be in vain.) Let us see what happened.

Leaving the hotel, on the night of the Grand Duke's death, I joined the man who was watching the cafe telephone.

There had been a message during the course of the evening, but it had been for a Greek cigarette-maker and it referred to the theft of several bales of Turkish tobacco—useful information, of minor kind, but of little interest to me. I knew that it would be useless to question the man Miguel, although I strongly suspected him of being a member of "The Scorpion's" organization. Any patron of the establishment enjoyed the privilege of receiving private telephone calls at the cafe on payment of a small fee.

A man of less experience in obscure criminology might now have assumed that he had been misled by a series of striking coincidences. Remember, there was not a shadow of doubt in the minds of the medical experts that the Grand Duke had died from syncope. His own professional advisor had sent written testimony to show that there was hereditary heart trouble, although not of a character calculated to lead to a fatal termination except under extraordinary circumstances. His own Government, which had every reason to suspect that the Grand Duke's assassination might be attempted, was satisfied. Eh bien! I was not.

I cross-examined the manager of the Theatre Coquerico. He admitted that Mlle. Zara el-Khala had been a mystery throughout her engagement. Neither he nor anyone else connected with the house had ever entered her dressing-room or held any conversation with her, whatever, except the stage-manager and the musical director. These had spoken to her about her music and about lighting and other stage effects. She spoke perfect French.

Such a state of affairs was almost incredible, but was explained by the fact that the dancer, at a most modest salary, had doubled the takings of the theatre in a few days and had attracted capacity business throughout the remainder of her engagement. She had written from Marseilles, enclosing press notices and other usual matter and had been booked direct for one week. She had remained for two months, and might have remained for ever, the poor manager assured me, at five times the salary!

A curious fact now came to light. In all her photographs Zara el-Khala appeared veiled, in the Eastern manner; that is to say, she wore a white silk yashmak which concealed all her face except her magnificent eyes! On the stage the veil was discarded; in the photographs it was always present.

And the famous picture which she had sent to the Grand Duke? He had destroyed it, in a fit of passion, on returning from the Bois de Boulogne after his encounter with Chunda Lal!

It is Fate after all—Kismet—and not the wit of man which leads to the apprehension of really great criminals—a tireless Fate which dogs their footsteps, a remorseless Fate from which they fly in vain. Long after the funeral of the Grand Duke, and at a time when I had almost forgotten Zara el-Khala, I found myself one evening at the opera with a distinguished French scientist and he chanced to refer to the premature death (which had occurred a few months earlier) of Henrik Ericksen, the Norwegian.

"A very great loss to the century, M. Max," he said. "Ericksen was as eminent in electrical science as the Grand Duke Ivan was eminent in the science of war. Both were stricken down in the prime of life—and under almost identical circumstances."

"That is true," I said thoughtfully.

"It would almost seem," he continued, "as if Nature had determined to foil any further attempts to rifle her secrets and Heaven to check mankind in the making of future wars. Only three months after the Grand Duke's death, the American admiral, Mackney, died at sea—you will remember? Now, following Ericksen, Van Rembold, undoubtedly the greatest mining engineer of the century and the only man who has ever produced radium in workable quantities, is seized with illness at a friend's house and expires even before medical aid can be summoned."

"It is very strange.'

"It is uncanny."

"Were you personally acquainted with the late Van Rembold?" I asked.

"I knew him intimately—a man of unusual charm, M. Max; and I have particular reason to remember his death, for I actually met him and spoke to him less than an hour before he died. We only exchanged a few words—we met on the street; but I shall never forget the subject of our chat."

"How is that?" I asked.

"Well, I presume Van Rembold's question was prompted by his knowledge of the fact that I had studied such subjects at one time; but he asked me if I knew of any race or sect in Africa or Asia who worshipped scorpions."

"Scorpions!" I cried. "Ah, mon Dieu! monsieur say it again— scorpions?"

"But yes, certainly. Does it surprise you?"

"Did it not surprise you?"

"Undoubtedly. I could not imagine what had occurred to account for his asking so strange a question. I replied that I knew of no such sect, and Van Rembold immediately changed the subject, nor did he revert to it. So that I never learned why he had made that singular inquiry."

You can imagine that this conversation afforded me much food for reflection. Whilst I could think of no reason why anyone should plot to assassinate Grand Dukes, admirals and mining engineers, the circumstances of the several cases were undoubtedly similar in a number of respects. But it was the remarkable question asked by Van Rembold which particularly aroused my interest.

Of course it might prove to be nothing more than a coincidence, but when one comes to consider how rarely the word "scorpion" is used, outside those in which these insects abound, it appears to be something more. Van Rembold, then, had had some occasion to feel curious about the scorpions; the name "Scorpion" was associated with the Hindu follower of Zara el-Khala; and she was who had brought the Grand Duke to Paris, where he had died.

Oh! it was a very fragile thread, but by following such a thread as this we are sometimes led to the heart of a labyrinth.

Beyond wondering if some sinister chain bound together this series of apparently natural deaths I might have made no move in the matter, but something occurred which spurred me to action. Sir Frank Narcombe, the great English surgeon, collapsed in the foyer of a London theatre and died shortly afterwards. Here again I perceived a case of a notable man succumbing unexpectedly in a public place—a case parallel to that of the Grand Duke, of Ericksen, of Van Rembold! it seemed as though some strange epidemic had attacked men of science—yes! they were all men of science, even including the Grand Duke, who was said to be the most scientific soldier in Europe, and the admiral, who had perfected the science of submarine warfare.

"The Scorpion!" … that name haunted me persistently. So much so that at last I determined to find out for myself if Sir Frank Narcombe had ever spoken about a scorpion or if there was any evidence to show that he had been interested in the subject.

I could not fail to remember, too, that Zara el-Khala had last been reported as crossing to England.

CHAPTER IV

THE FIGHT IN THE CAFE

New Scotland Yard had been advised that any reference to a scorpion, in whatever form it occurred, should be noted and followed up, but nothing had resulted and as a matter of fact I was not surprised in the least. All that I had learned—and this was little enough—I had learned more or less by accident. But I came to the conclusion that a visit to London might be advisable.

I had caused a watch to be kept upon the man Miguel, whose establishment seemed to be a recognized resort of shady characters. I had no absolute proof, remember, that he knew anything of the private affairs of the Hindu, and no further reference to a scorpion had been made by anyone using the cafe telephone. Nevertheless I determined to give him a courtesy call before leaving for London … and to this determination I cannot doubt that once again I was led by providence.

Attired in a manner calculated to enable me to pass unnoticed among the patrons of the establishment, I entered the place and ordered cognac. Miguel having placed it before me, I lighted a cigarette and surveyed my surroundings.

Eight or nine men were in the cafe, and two women. Four of the men were playing cards at a corner table, and the others were distributed about the place, drinking and smoking. The women, who were flashily dressed but who belonged to that order of society which breeds the Apache, were deep in conversation with a handsome Algerian. I recognized only one face in the cafe—that of a dangerous character, Jean Sach, who had narrowly escaped the electric chair in the United States and who was well known to the Bureau. He was smiling at one of the two women—the woman to whom the Algerian seemed to be more particularly addressing himself.

Another there was in the cafe who interested me as a student of physiognomy—a dark, bearded man, one of the card-players. His face was disfigured by a purple scar extending from his brow to the left corner of his mouth, which it had drawn up into a permanent snarl, so that he resembled an enraged and dangerous wild animal. Mentally I classified this person as "Le Balafre."

I had just made up my mind to depart when the man Sach arose, crossed the cafe and seated himself insolently between the Algerian and the woman to whom the latter was talking. Turning his back upon the brown man, he addressed some remark to the woman, at the same time leering in her face.

Women of this class are difficult, you understand? Sach received from the lady a violent blow upon the face which rolled him on the floor! As he fell, the Algerian sprang up and drew a knife. Sach rolled away from him and also reached for the knife which he carried in a hip-pocket.

Before he could draw it, Miguel, the quadroon proprietor, threw himself upon him and tried to pitch him into the street. But Sach, although a small man, was both agile and ferocious. He twisted out of the grasp of the huge quadroon and turned, raising the knife. As he did so, the Algerian deftly kicked it from his grasp and left Sach to face Miguel unarmed. Screaming with rage, he sprang at Miguel's throat, and the tow fell writhing upon the floor.

There could only be one end to such a struggle, of course, as the Algerian recognized by replacing his knife in his pocket and resuming his seat. Miguel obtained a firm hold upon Sacah and raised him bodily above his head, as one has seen a professional weight-lifter raise a heavy dumb-bell. Thus he carried him, kicking and foaming at the mouth with passion, to the open door. From the step he threw him into the middle of the street.

At this moment I observed something glittering upon the floor close to the chair occupied by the Algerian. Standing up—for I had determined to depart—I crossed in that direction, stooped and picked up this object which glittered. As my fingers touched it, so did my heart give a great leap.

The object was a golden scorpion!

Forgetful of my dangerous surroundings I stood looking at the golden ornament in my hand … when suddenly and violently it was snatched from me! The Algerian, his brown face convulsed with rage, confronted me.

"Where did you find that charm?" he cried. "It belongs to me."

"Very well," I replied—"you have it."

He glared at me with a ferocity which the incident scarcely seemed to merit and exchanged a significant glance with someone who had approached and who now stood behind me. Turning, I met a second black gaze—that of the quadroon who having restored order had returned from the cafe door and now stood regarding me. "Did you find it on the floor?" asked Miguel suspiciously.

"I did."

He turned to the Algerian.

"It fell when you kicked the knife from the hand of that pig," he said. "You should be more careful."

Again they exchanged significant glances, but the Algerian resumed his seat and Miguel went behind the counter. I left the cafe conscious of the fact that black looks pursued me.

The night was very dark, and as I came out on to the pavement someone touched me on the arm. I turned in a flash.

"Walk on, friend," said the voice of Jean Sach. "What was it that you picked up from the floor?"

"A golden scorpion," I answered quickly.

"Ah!" he whispered—"I thought so! It is enough. They shall pay for what they have done to me—those two. Hurry, friend, as I do."

Before I could say another word or strive to detain him, he turned and ran off along a narrow courtway which at this point branched from the street.

I stood for a moment, nonplussed, staring after him. By good fortune I had learned more in ten minutes than by the exercise of all my ingenuity and the resources of the Service I could have learned in ten months! Par al barbe du prophete the Kismet which dogs the footsteps of malefactors assisted me!

Recollecting the advice of Jean Sach, I set off at a brisk pace along the street, which was dark and deserted and which passed through a district marked red on the Paris crimes-map. Arriving at the corner, above which projected a lamp, I paused and glanced back into the darkness. I could see no one, but I thought I could detect the sound of stealthy footsteps following me.

The suspicion was enough. I quickened my pace, anxious to reach the crowded boulevard upon which this second street opened. I reached it unmolested, but intending to throw any pursuer off the track, I dodged and doubled repeatedly on the way to my flat and arrived there about midnight, convinced that I had eluded pursuit—if indeed I had been pursued.

All my arrangements were made for leaving Paris, and now I telephoned to the assistant on duty in my office, instructing him to take certain steps in regard to the proprietor of the cafe and the Algerian and to find the hiding-place of the man Jean-Sach. I counted it more than ever important that I should go to London at once.

In this belief I was confirmed at the very moment that I boarded the Channel steamer at Boulogne: for as I stepped upon the deck I found myself face to face with a man who was leaning upon the rail and apparently watching the passengers coming on board. He was a man of heavy build, dark and bearded, and his face was strangely familiar.

Turning, as I lighted a cigarette, I glanced back at him in order to obtain a view of his profile. I knew him instantly—for now the scar was visible. It was "Le Balafre" who had been playing cards in Miguel's cafe on the previous night!

I have sometimes been criticised, especially by my English confreres, for my faith in disguise. I have been told that no disguise is impenetrable to the trained eye. I reply that there are many disguises but few trained eyes! To my faith in disguise I owed the knowledge that a golden scorpion was the token of some sort of gang, society, or criminal group, and to this same faith which an English inspector of police once assured me to be a misplaced one I owed, on boarding the steamer, my escape from detection by this big bearded fellow who was possibly looking out for me!

Yet, I began to wonder if after all I had escaped the shadowy pursuer whose presence I had suspected in the dark street outside the cafe or if he had tracked me and learned my real identity. In any event, the roles were about to be reversed! "Le Balafre" at Folkestone took a seat in a third-class carriage of the London train. I took one in the next compartment.

Arrived at Charing Cross, he stood for a time in the booking-hall, glanced at his watch, and then took up the handbag which he carried and walked out into the station yard. I walked out also.

"Le Balafre" accosted a cabman; and as he did so I passed close behind him and overheard a part of the conversation.

"… Bow Road Station East! It's too far. What?"

I glanced back. The bearded man was holding up a note—a pound note apparently. I saw the cabman nod. Without an instant's delay I rushed up to another cabman who had just discharged a passenger.

"To Bow Road Station East!" I said to the man. "Double fare if you are quick!"

It would be a close race. But I counted on the aid of that Fate which dogs the steps of wrong-doers! My cab was off first and the driver had every reason for hurrying. From the moment that we turned out into the Strand until we arrived at our destination I saw no more of "Le Balafre." My extensive baggage I must hope to recover later.

At Bow Road Station I discovered a telephone box in a dark corner which commanded a view of the street. I entered this box and waited. It was important that I should remain invisible. Unless my bearded friend had been unusually fortunate he could not well have arrived before me.

As it chanced I had nearly six minutes to wait. Then, not ten yards away, I saw "Le Balafre" arrive and dismiss the cabman outside the station.

There was nothing furtive in his manner; he was evidently satisfied that no one pursued him; and he stood in the station entrance almost outside my box and lighted a cigar!

Placing his bag upon the floor, he lingered, looking to left and right, when suddenly a big closed car painted dull yellow drew up beside the pavement. It was driven by a brown-faced chauffeur whose nationality I found difficulty in placing, for he wore large goggles. But before I could determine upon my plan of action, "Le Balafre" crossed the pavement and entered the car—and the car glided smoothly away, going East. A passing lorry obstructed my view and I even failed to obtain a glimpse of the number on the plate.

But I had seen something which had repaid me for my trouble. As the man of the scar had walked up to the car, had exhibited to the brown-skinned chauffeur some object which he held in the palm of his hand … an object which glittered like gold!

II. "LE BALAFRE"

CHAPTER I

I BECOME CHARLES MALET

Behold me established in rooms in Battersea and living retired during the day while I permitted my beard to grow. I had recognized that my mystery of "The Scorpion" was the biggest case which had ever engaged the attention of the Service de Surete, and I was prepared, if necessary, to devote my whole time for twelve months to its solution. I had placed myself in touch with Paris, and had had certain papers and licenses forwarded to me. A daily bulletin reached me, and one of these bulletins was sensational.

The body of Jean Sach had been recovered from the Seine. The man had been stabbed to the heart. Surveillance of Miguel and his associates continued unceasingly, but I had directed that no raids or arrests were to be made without direct orders from me.

I was now possessed of a French motor license and also that of a Paris taxi-driver, together with all the other documents necessary to establish the identity of one Charles Malet. Everything was in order. I presented myself—now handsomely bearded—at New Scotland Yard and applied for a license. The "knowledge of London" and other tests I passed successfully and emerged a fully-fledged cabman!

Already I had opened negotiations for the purchase of a dilapidated but seviceable cab which belonged to a small proprietor who had obtained a car of more up-to-date pattern to replace this obsolete one. I completed these negotiations by paying down a certain sum and arranged to garage my cab in the disused stable of a house near my rooms in Battersea.

Thus I now found myself in a position to appear anywhere at any time without exciting suspicion, enabled swiftly to proceed from point to point and to pursue anyone either walking or driving whom it might please me to pursue. It was a modus operandi which had served me well in Paris and which had led to one of my biggest successes (the capture of the French desperado known as "Mr. Q.") in New York.

I had obtained, via Paris, particulars of the recent death of Sir Frank Narcombe, and the circumstances attendant upon his end were so similar to those which had characterized the fate of the Grand Duke, of Van Rembold and the others, that I could not for a moment believe them to be due to mere coincidence. Acting upon my advice Paris advised Scotland Yard to press for a post mortem examination of the body, but the influence of Sir Frank's family was exercised to prevent this being carried out—and exercised successfully.

Meanwhile, I hovered around the houses, flats, clubs and offices of everyone who had been associated with the late surgeon, noting to what addresses they directed me to drive and who lived at those address. In this way I obtained evidence sufficient to secure three judicial separations, but not a single clue leading to "The Scorpion"! No matter.

At every available opportunity I haunted the East-End streets, hoping for a glimpse of the big car and the brown-skinned chauffeur or of my scarred man from Paris. I frequented all sorts of public bars and eating-houses used by foreign and Asiatics. By day and by night I roamed about the dismal thoroughfares of that depressing district, usually with my flag down to imply that I was engaged.

Such diligence never goes long unrewarded. One evening, having discharged a passenger, a mercantile officer, at the East India Docks, as I was drifting, watchfully, back through Limehouse, I saw a large car pull up just ahead of me in the dark. A man got out and the car was driven off.

Two courses presented themselves. I was not sure that this was the car for which I sought, but it strangely resembled it. Should I follow the car or the man? A rapid decision was called for. I followed the man.

That I had not been mistaken in the identity of the car shortly appeared. The man took out a cigar and standing on the corner opposite the Town Hall, lighted it. I was close to him at the time, and by the light of the match, which he sheltered with his hands, I saw the scarred and bearded face! Triomphe! it was he!

Having lighted his cigar, he crossed the road and entered the saloon of a neighbourhood public-house. Locking my cab I, also, entered that saloon. I ordered a glass of bitter beer and glanced around at the object of my interest. He had obtained a glass of brandy and was contorting his hideous face as he sipped the beverage. I laughed.

"Have they tried to poison you, mister!" I said.

"Ah,pardieu! poison—yes!" he replied.

"You want to have it out of a bottle," I continued confidentially—
"Martell's Three Stars."

He stared at me uncomprehendingly.

"I don't know," he said haltingly. "I have very little English."

"Oh, that's it!" I cried, speaking French with a barbarous accent.
"You only speak French?"

"Yes, yes," he replied eagerly. "It is so difficult to make oneself understood. This spirit is not cognac, it is some kind of petrol!"

Finishing my bitter, I ordered two glasses of good brandy and placed one before "Le Balafre."

"Try that," I said, continuing to speak in French, "You will find it is better."

He sipped from his glass and agreed that I was right. We chatted together for ten minutes and had another drink, after which my dangerous-looking acquaintance wished me good-night and went out. The car had come from the West, and I strongly suspected that my man either lived in the neighbourhood or had come there to keep an appointment. Leaving my cab outside the public-house, I followed him on foot, down Three Colt Street to Ropemaker Street, where he turned into a narrow alley leading to the riverside. It was straight and deserted, and I dared not follow further until he had reached the corner. I heard his footsteps pass right to the end. Then the sound died away. I ran to the corner. The back of a wharf building—a high blank wall—faced a row of ramshackle tenements, some of them built of wood; but not a soul was in sight.

I reluctantly returned to the spot at which I had left the cab—and found a constable there who wanted to know what I meant by leaving a vehicle in the street unattended. I managed to enlist his sympathy by telling him that I had been in pursuit of a "fare" who had swindled me with a bad half-crown. The ruse succeeded.

"Which street did he go down, mate?" asked the constable.

I described the street and described the scarred man. The constable shook his head.

"Sounds like one o' them foreign sailormen," he said. "But I don't know what he can have gone down there for. It's nearly all Chinese, that part."

His words came as a revelation; they changed the whole complexion of the case. It dawned upon me even as he spoke the word "Chinese" that the golden scorpion which I had seen in the Paris cafe was of Chinese workmanship! I started my engine and drove slowly to that street in which I had lost the track of "Le Balafre." I turned the cab so that I should be ready to drive off at a moment's notice, and sat there wondering what my next move should be. How long I had been there I cannot say, when suddenly it began to rain in torrents.

What I might have done or what I had hoped to do is of no importance; for as I sat there staring out at the dismal rain-swept street, a man came along, saw the head-lamps of the cab and stopped, peering in my direction. Evidently perceiving that I drove a cab and not a private car, he came towards me.

"Are you disengaged?" he asked.

Whether it was that I sympathized with him—he had no topcoat or umbrella—or whether I was guided by Fate I know not, but as he spoke I determined to give up my dreary vigil for that night. Pardieu! but certainly it was Fate again!

"Well, I suppose I am, sir," I said, and asked him where he wanted to go.

He gave an address not five hundred yards from my own rooms! I thought this so curious that I hesitated no longer.

"Jump in," I said; and still seeking in my mind for a link between the scorpion case and China, I drove off, and in less than half an hour, for the streets were nearly empty, arrived at my destination.

The passenger, whose name was Dr. Keppel Stuart, very kindly suggested a glass of hot grog, and I did not refuse his proferred hospitality. When I came out of his house again, the rain had almost ceased, and just as I stooped to crank the car I thought I saw a shadowy figure moving near the end of a lane which led to the tradesmen's entrance of Dr. Stuart's house. A sudden suspicion laid hold upon me—a horrible doubt.

Having driven some twenty yards along the road, I leaned from my seat and looked back. A big man wearing a black waterproof overall was standing looking after me!

Remembering how cleverly I had been trailed from Miguel's cafe to my flat, in Paris (for I no longer doubted that someone had followed me on that occasion), I now perceived that I might again be the object of the same expert's attention. Stopping my engine half-way along the next road, I jumped out and ran back, hiding in the bushes which grew beside the gate of a large empty house. I had only a few seconds to wait.

A big closed car, running almost silently, passed before me … and
"Le Balafre" was leaning out of the window!

At last I saw my chance of finding the headquarters of "The Scorpion." Alas! The man of the scar was as swift to recognize that possibility as I. A moment after he had passed my stationary cab, and found it to be deserted, his big car was off like the wind, and even before I could step out from the bushes the roar of the powerful engine was growing dim in the distance!

I was detected. I had to deal with dangerously clever people.

CHAPTER II

BAITING THE TRAP

The following morning I spent at home, in my modest rooms, reviewing my position and endeavouring to adjust my plans in accordance with the latest development. "The Scorpion" had scored a point. What had aroused the suspicions "Le Balafre," I knew not; but I was inclined to think that he had been looking from some window or peep-hole in the narrow street with the wooden houses when I had, injudiciously, followed him there.

On the other hand, the leakage might be in Paris—or in my correspondence system. The man of the scar might have been looking for me as I was looking for him. That he was looking for someone on the cross-channel boat I had not doubted.

He was aware, then that Charles Malet, cabman, was watching him. But was he aware that Charles Malet was Gaston Max? And did he know where I lived? Also—did he perchance think that my meeting with Dr. Stuart in Limehouse had been prearranged? Clearly he had seen Dr. Stuart enter my cab, for he had pursued us to Battersea.

This course of reflection presently led me to a plan. It was a dangerous plan, but I doubted if I should ever find myself in greater danger than I was already. Nom d'un nom! I had not forgotten the poor Jean Sach!

That night, well knowing that I carried my life in my hands, I drove again to Limehouse Town Hall, and again leaving my cab outside went into the bar where I had preciously me "Le Balafre." If I had doubted that my movements were watched I must now have had such doubts dispelled; for two minutes later the man with the scar came in and greeted me affably!

I had learned something else. He did not know that I had recognized him as the person who had tracked me to Dr. Stuart's house!

He invited me to drink with him, and I did so. As we raised our glasses I made a move. Looking all about me suspiciously:

"Am I right in supposing that you have business in this part of
London?" I asked.

"Yes," he replied "My affairs bring me here sometimes."

"You are well acquainted with the neighbourhood?"

"Fairly well. But actually of course I am a stranger to London."

I tapped him confidentially upon the breast.

"Take my advice, as a friend," I said, "and visit these parts as rarely as possible."

"Why do you say that?"

"It is dangerous. From the friendly manner in which you entered into conversation with me, I perceived that you were of a genial and unsuspicious nature. Very well. I warn you. Last night I was followed from a certain street not far from here to the house of a medical man who is a specialist in certain kinds of criminology, you understand."

He stared at me very hard, his teeth bared by that fearful snarl. "You are a strange cabman."

"Perhaps I am. No matter. Take my advice. I have things written here"—I tapped the breast of my tunic—"which will astonish all the world shortly. I tell you, my friend, my fortune is made."

I finished my drink and ordered another for myself and one for my acquaintance. He was watching me doubtfully. Taking up my replenished glass, I emptied it at a draught and ordered a third. I leaned over towards the scarred man, resting my hand heavily upon his shoulder.

"Five thousand pounds," I whispered thickly, "has been offered for the information which I have here in my pocket. It is not yet complete, you understand, and because they may murder me before I obtain the rest of the facts, do you know what I am going to do with this?"

Again I tapped my tunic pocket. "Le Balafre" frowned perplexedly.

"I don't even know what you are talking about, my friend," he replied.

"I know what I am talking about," I assured him, speaking more and more huskily. "Listen, then: I am going to take all my notes to my friend, the doctor, and leave them with him, sealed—sealed, you follow me? If I do not come back for them, In a week, shall we say?—he sends them to the police. I do not profit, you think? No.morbleu! but there are some who hang!"

Emptying my third glass, I ordered a fourth and one for my companion.
He checked me.

"No more for me, thank you," he said. "I have—business to attend to.
I will wish you good-night."

"Good-night!" I cried boisterously—"good-night, friend! take heed of my good advice!"

As he went out, the barman brought me my fourth glass of cognac, staring at me doubtfully. Our conversation had been conducted in French, but the tone of my voice had attracted attention.

"Had about enough, ain't you, mate?" he said. "Your ugly pal jibbed!"

"Quite enough!" I replied, in English now of course. "But I've had a stroke of luck to-night and I feel happy. Have one with me. This is a final."

On going out into the street I looked cautiously about me, for I did not expect to reach the house of Dr. Stuart unmolested. I credited "Le Balafre" with sufficient acumen to distrust the genuineness of my intoxication, even if he was unaware of my real identity. I never make the mistake of underestimating an opponent's wit, and whilst acting on the assumption that the scarred man knew me to be forcing his hand, I recognized that whether he believed me to be drunk or sober, Gaston Mas or another, his line of conduct must be the same. He must take it for granted that I actually designed to lodge my notes with Dr. Stuart and endeavour to prevent me doing so.

I could detect no evidence of surveillance whatever and cranking the engine I mounted and drove off. More than once, as I passed along Commercial Road, I stopped and looked back. But so far as I could make out no one was following me. The greater part of my route lay along populous thoroughfares, and of this I was not sorry; but I did not relish the prospect of Thames Street, along which presently my course led me.

Leaving the city behind me, I turned into that thoroughfare, which at night is almost quite deserted, and there I pulled up. Pardieu! I was disappointed! It seemed as though my scheme had miscarried. It could not understand why I had been permitted to go unmolested, and I intended to walk back to the corner for a final survey before continuing my journey. This survey was never made.

As I stopped the cab and prepared to descend, a faint—a very faint— sound almost in my ear, set me keenly on the alert. Just in the nick of time I ducked … as the blade of a long knife flashed past my head, ripping its way through my cloth cap!

Yes! That movement had saved my life, for otherwise the knife must have entered my shoulder—and pierced to my heart!

Someone was hidden in the cab!

He had quietly opened one of the front windows and had awaited a suitable opportunity to stab me. Now, recognizing failure, he leapt out on the near side as I lurched and stumbled from my seat, and ran off like the wind. I never so much as glimpsed him.

"Mon Dieu!" I muttered, raising my hand to my head, from which blood was trickling down my face, "the plan succeeds!"

I bound a handkerchief as tightly as possible around the wound in my scalp and put my cap on to keep the bandage in place. The wound was only a superficial one, and except for the bleeding I suffered no inconvenience from it. But I had now a legitimate reason for visiting Dr. Stuart, and as I drove on towards Battersea I was modifying my original plan in accordance with the unforeseen conditions.

It was long past Dr. Stuart's hours of consultation when I arrived at his house, and the servant showed me into a waiting-room, informing me that the doctor would join me in a few minutes. Directly she had gone out I took from the pocket of my tunic the sealed envelope which I had intended to lodge with the doctor. Pah! it was stained with blood which had trickled down from the wound in my scalp!

Actually, you will say, there was no reason why I should place a letter in the hand of Dr. Stuart; my purpose would equally well be served by pretending that I had done so. Ah, but I knew that I had to deal with clever people—with artists in crime—and it behooved me to be an artist also. I had good reason to know that their system of espionage was efficient; and the slipshod way is ever the wrong way.

The unpleasantly sticky letter I returned to my pocket, looking around me for some means of making up any kind of packet which could do duty as a substitute. Beyond a certain draped over a recess at one end of the waiting-room I saw a row of boxes, a box of lint and other medical paraphernalia. It was the doctor's dispensary. Perhaps I might find there an envelope.

I crossed the room and looked. Immediately around the corner, on a level with my eyes, was a packet of foolscap envelopes and a stick of black sealing-wax! Bien! all that I now required was a stout sheet of paper to enclose in one of those envelopes. But not a scrap of paper could I find, except the blood-stained letter in my pocket— towards which I had formed a strong antipathy. I had not even a newspaper in my possession. I thought of folding three or four envelopes, but there were only six in all, and the absence of so many might be noted.

Drawing aside a baize curtain which hung from the bottom shelf, I discovered a number of old card-board boxes. It was sufficient. With a pair of surgical scissors I cut a piece from the lid of one and thrust it into an envelope, gumming down the lapel. At a little gas jet intended for the purpose I closed both ends with wax and— singular coincidence!—finding a Chinese coin fastened to a cork lying on the shelf, my sense of humour prompted me to use it as a seal! Finally, to add to the verisimilitude of the affair I borrowed a pen which rested in a bottle of red ink and wrote upon the envelope the number: 30, that day being the thirtieth day of the month.

It was well that the artist within me had dictated this careful elaboration, as became evident a few minutes later when the doctor appeared at the head of a short flight of stairs and requested me to step up to his consulting-room. It was a small room, so that the window, over which a linen blind was drawn, occupied nearly the whole of one wall. As Dr. Stuart, having examined the cut on my scalp, descended to the dispensary for lint, the habits of a lifetime asserted themselves.

I quickly switched off the light and peeped out of the window around the edge of the blind, which I drew slightly aside. In the shadow of the wall upon the opposite side of the narrow lane a man was standing! I turned on the light again. The watcher should not be disappointed!

My skull being dressed, I broached the subject of the letter, which I said I had found in my cab after the accident which had caused the injury.

"Someone left this behind to-day, sir," I said; "perhaps the gentleman who was with me when I had the accident; and I've got no means of tracing him. He may be able to trace me, though, or he may advertise. It evidently contains something valuable. I wonder if you would do me a small favour? Would you mind taking charge of it for a week or so, until it is claimed?"

He asked me why I did not take it to Scotland Yard.

"Because," said I, "if the owner claims it from Scotland Yard he is less likely to be generous than if he gets it direct from me!"

"But what is the point," asked Dr. Stuart, "in leaving it here?"

I explained that if I kept the letter I might be suspected of an intention of stealing it, whereas directly there was any inquiry, he could certify that I had left it in his charge. He seemed to be satisfied and asked me to come into his study for a moment. The man in the lane was probably satisfied, too. I had stood three paces from the table-lamp all the time, waving the letter about as I talked, and casting a bold shadow on the linen blind!

The first thing that struck me as I entered the doctor's study was that the French windows, which opened on a sheltered lawn, were open. I acted accordingly.

"You see," said Dr. Stuart, "I am enclosing your letter in this big envelope which I am sealing."

"Yes, sir," I replied, standing at some distance from him, so that he had to speak loudly. "And would you mind addressing it to the Lost Property Office."

"Not at all," said he, and did as I suggested. "If not reclaimed within a reasonable time, it will be sent to Scotland Yard."

I edged nearer to the open window.

"If it is not reclaimed," I said loudly, "it goes to Scotland Yard—yes."

"Meanwhile," concluded the doctor, "I am locking it in this private drawer in my bureau."

"It is locked in your bureau. Very good."

CHAPTER III

DISAPPEARANCE OF CHARLES MALET

Knowing, and I knew it well, that people of "The Scorpion" were watching, I do not pretend that I felt at my ease as I drove around to the empty house in which I garaged my cab. My inquiry had entered upon another stage, and Charles Malet was about to disappear from the case. I was well aware that if he failed in his vigilance for a single moment he might well disappear from the world!

The path which led to the stables was overgrown with weeds and flanked by ragged bushes; weeds and grass sprouted between the stones paving the little yard, also, although they were withered to a great extent by the petrol recently spilled there. Having run the cab into the yard, I alighted and looked around the deserted grounds, mysterious in the moonlight. Company would have been welcome, but excepting a constable who had stopped and chatted with me on one or two evenings I always had the stables to myself at night.

I determined to run the cab into the stable and lock it up without delay, for it was palpably dangerous in the circumstances to remain longer than necessary in that lonely spot. Hurriedly I began to put out the lamps. I unlocked the stable doors and stood looking all about me again. I was dreading the ordeal of driving the cab those last ten yards into the garage, for whilst I had my back to the wilderness of bushes it would be an easy matter for anyone in hiding there to come up behind me.

Nevertheless, it had to be done. Seating myself at the wheel I drove into the narrow building, stopped the engine and peered cautiously around toward the bright square formed by the open doors. Nothing was to be seen. No shadow moved.

A magazine pistol held in my hand, I crept, step by step, along the wall until I stood just within the opening. There I stopped.

I could hear a sound of quick breathing! There was someone waiting outside!

Dropping quietly down upon the pavement, I slowly protruded my head around the angle of the brick wall at a point not four inches above the ground. I knew that whoever waited would have his eyes fixed upon the doorway at the level of a man's head.

Close to the wall, a pistol in his left hand and an upraised stand-bag in his right, stood "Le Balafre!" His eyes gleamed savagely in the light of the moon and his teeth were bared in that fearful animal snarl. But he had not seen me.

Inch by inch I thrust my pistol forward, the barrel raised sharply. I could not be sure of my aim, of course, nor had I time to judge it carefully.

I fired.

The bullet was meant for his right wrist, but it struck him in the fleshy part of his arm. Uttering a ferocious cry he leapt back, dropped his pistol—and perceiving me as I sprang to my feet, lashed at my head with the sand-bag. I raised my left arm to guard my skull and sustained the full force of the blow upon it.

I staggered back against the wall, and my own pistol was knocked from my grasp. My left arm was temporarily useless and the man of the scar was deprived of the use of his right. Pardieu! I had the better chance!

He hurled himself upon me.

Instantly he recovered the advantage, for he grasped me by the throat with his left hand—and, nom d'un nom! what a grip he had! Flat against the wall he held me, and began, his teeth bared in that fearful grin, to crush the life from me.

To such an attack there was only one counter. I kicked him savagely— and that death-grip relaxed. I writhed, twisted—and was free! As I regained my freedom I struck up at him, and by great good fortune caught him upon the point of the jaw. He staggered. I struck him over the heart, and he fell I pounced upon him, exulting, for he had sought my life and I knew no pity.

Yet I had not thought so strong a man would choke so easily, and for some moments I stood looking down at him, believing that he sought to trick me. But it was not so. His affair was finished.

I listened. The situation in which I found myself was full of difficulty. An owl screeched somewhere in the trees, but nothing else stirred. The sound of the shot had not attracted attention, apparently. I stooped and examined the garments of the man who lay at my feet.

He carried a travel coupon to Paris bearing that day's date, together with some other papers, but, although I searched all his pockets, I could find nothing of real interest, until in an inside pocket of his coat I felt some hard, irregularly shaped object. I withdrew it, and in the moonlight it lay glittering in my palm … a golden scorpion!

It had apparently been broken in the struggle. The tail was missing, nor could I find it: but I must confess that I did not prolong the search.

Some chance effect produced by the shadow of the moonlight, and the presence of that recently purchased ticket, gave me the idea upon which without delay I proceeded to act. Satisfying myself that there was no mark upon any of his garments by which the man could be identified, I unlocked from my wrist an identification disk which I habitually wore there, and locked it upon the wrist of the man with the scar!

Clearly, I argued, he had been detailed to dispatch me and then to leave at once for France. I would make it appear that he had succeeded.

Behold me, ten minutes later, driving slowly along a part of the Thames Embankment which I chanced to remember, a gruesome passenger riding behind me in the cab. I was reflecting as I kept a sharp look-out for a spot which I had noted one day during my travels, how easily one could commit murder in London, when a constable ran out and intercepted me!

Mon Deiu! how my heart leapt!

"I'll trouble you for your name and number, my lad," he said.

"What for?" I asked, and remembering a rare fragment of idiom: "What's up with you?" I added.

"Your lamp's out!" he cried, "that's what's up with me!"

"Oh," said I, climbing from my seat—"very well. I'm sorry. I didn't know. But here is my license."

I handed him the little booklet and began to light my lamps, cursing myself for a dreadful artist because I had forgotten to do so.

"All right," he replied, and handed it back to me. "But how the devil you've managed to get all your lamps out, I can't imagine!"

"This is my first job since dusk," I explained hurrying around to the tail-light. "And he don't say much!" remarked the constable.

I replaced my matches in my pocket and returned to the front of the cab, making a gesture as of one raising a glass to his lips and jerking my thumb across my shoulder in the direction of my unseen fare.

"Oh, that's it!" said the constable, and moved off.

Never in my whole career have I been so glad to see the back of any man!

I drove on slowly. The point for which I was making was only some three hundred yards further along, but I had noted that the constable had walked off in the opposite direction. Therefore, arriving at my destination—a vacant wharf open to the road—I pulled up and listened.

Only the wash of the tide upon the piles of the wharf was audible, for the night was now far advanced.

I opened the door of the cab and dragged out "Le Balafre." Right and left I peered, truly like a stage villain, and then hauled my unpleasant burden along the irregularly paved path and on to the little wharf. Out in mid-stream a Thames Police patrol was passing, and I stood for a moment until the creak of the oars grew dim.

Then: there was a dull splash far below … and silence again.

Gaston Max had been consigned to a watery grave!

Returning again to the garage, I wondered very much who he had been, this one, "Le Balafre." Could it be that he was "The Scorpion"? I could not tell, but I had hopes very shortly of finding out. I had settled up my affairs with my landlady and had removed from my apartments all papers and other effects. In the garage I had placed a good suit of clothes and other necessities, and by telephone I had secured a room at a West-End hotel.

The cab returned to the stable, I locked the door, and by the light of one of the lamps, shaved off my beard and moustache. My uniform and cap I hung up on the hook where I usually left them after working hours, and changed into the suit which I had placed there in readiness. I next destroyed all evidences of identity and left the place in a neat condition. I extinguished the lamp, went out and locked the door behind me, and carrying a travelling-grip and a cane I set off for my new hotel.

Charles Malet had disappeared!

CHAPTER IV

I MEET AN OLD ACQUAINTANCE

On the corner opposite Dr. Stuart's establishment stood a house which was "to be let or sold." From the estate-agent whose name appeared upon the notice-board I obtained the keys—and had a duplicate made of that which opened the front door. It was a simple matter, and the locksmith returned both keys to me within an hour. I informed the agent that the house would not suit me.

Nevertheless, having bolted the door, in order that prospective purchasers might not surprise me, I "camped out" in an upper room all day, watching from behind the screen of trees all who came to the house of Dr. Stuart. Dusk found me still at my post, armed with a pair of good binoculars. Every patient who presented himself I scrutinized carefully, and finding as the darkness grew that it became increasingly difficult to discern the features of visitors, I descended to the front garden and resumed my watch from the lower branches of a tree which stood some twenty feet from the roadway.

At selected intervals I crept from my post and surveyed the lane upon which the window of the consulting-room opened and also the path leading to the tradesmen's entrance, from which one might look across the lawn and in at the open study windows. It was during one of these tours of inspection and whilst I was actually peering through a gap in the hedge, that I heard the telephone bell. Dr. Stuart was in the study and I heard him speaking.

I gathered that his services were required immediately at some institution in the neighbourhood. I saw him take his hat, stick and bag from the sofa and go out of the room. Then I returned to the front garden of my vacant house.

No one appeared for some time. A policeman walked slowly up the road, and flashed his lantern in at the gate of the house I had commandeered. His footsteps died away. Then, faintly, I heard the hum of a powerful motor. I held my breath. The approaching car turned into the road at a point above me to the right, came nearer … and stopped before Dr. Stuart's door.

I focussed my binoculars upon the chauffeur.

It was the brown-skinned man! Nom d'un nom! a woman was descending form the car. She was enveloped in furs and I could not see her face. She walked up the steps to the door and was admitted.

The chauffeur backed the car into the lane beside the house.

My heart beating rapidly with excitement, I crept out by the further gate of the drive, crossed the road at a point fifty yards above the house and walking very quietly came back to the tradesmen's entrance. Into its enveloping darkness I glided and on until I could peep across the lawn.

The elegant visitor, as I hoped, had been shown, not into the ordinary waiting-room but into the doctor's study. She was seated with her back to the window, talking to a grey-haired old lady—probably the doctor's housekeeper. Impatiently I waited for this old lady to depart, and the moment that she did so, the visitor stood up, turned and … it was Zara el-Khala!

It was only with difficulty that I restrained the cry of triumph which arose to my lips. On the instant that the study door closed, Zara el-Khala began to try a number of keys which she took from her handbag upon the various drawers of the bureau!

"So!" I said—"they are uncertain of the drawer!"

Suddenly she desisted, looking nervously at the open windows; then, crossing the room, she drew the curtains. I crept out into the road again and by the same roundabout route came back to the empty house. Feeling my way in the darkness of the shrubbery, I found the motor bicycle which I had hidden there and I wheeled it down to the further gate of the drive and waited.

I could see the doctor's door, and I saw him returning along the road. As he appeared, from somewhere—-I could not determine from where—came a strange and uncanny wailing sound, a sound that chilled me like an evil omen.

Even as it died away, and before Dr. Stuart had reached his door I knew what it portended—that horrible wail. Some one hidden I knew not where, had warned Zara el-Khala that the doctor returned! But stay! Perhaps that some one was the dark-skinned chauffeur!

How I congratulated myself upon the precautions which I had taken to escape observation. Evidently the watcher had placed himself somewhere where he could command a view of the front door and the road.

Five minutes later the girl came out, the old housekeeper accompanying her to the door, the car emerged from the lane, Zara el-Khala entered it and was driven away. I could see no one seated beside the chauffeur. I started my "Indian" and leapt in pursuit.

As I had anticipated, the route was Eastward, and I found myself traversing familiar ground. From the south-west to the east of London whirled the big car of mystery—and I was ever close behind it. Sometimes, in the crowded streets, I lost sight of my quarry for a time, but always I caught up again, and at last I found myself whirling along Commercial Road and not fifty yards behind the car.

Just by the canal bridge a drunken sailor lurched out in front of my wheel, and only by twisting perilously right into a turning called, I believe, Salmon Lane, did I avoid running him down.

Sacre nom! how I cursed him! The lane was too narrow for me to turn and I was compelled to dismount and to wheel my "Indian" back to the highroad. The yellow car had vanished, of course, but I took it for granted that it had followed the main road. At a dangerous speed, pursued by execrations from the sailor and all his friends, I set off east once more turning to the right down West India Dock Road.

Arriving at the dock, and seeing nothing ahead of me but desolation and ships' masts, I knew that that inebriated pig had spoiled everything! I could have sat down upon the dirty pavement and wept, so mortified was I! For if Zara el-Khala had secured the envelope I had missed my only chance.

However, pardieu! I have said that despair is not permitted by the Bureau. I rode home to my hotel, deep in reflection. Whether the girl had the envelope or not, at least she had escaped detection by the doctor; therefore if she had failed she would try again. I could sleep in peace until the morrow.

Of the following day, which I spent as I had spent the preceding one, I have nothing to record. At about the same time in the evening the yellow car again rolled into view, and on this occasion I devoted all my attention to the dark-skinned chauffeur, upon whom I directed my glasses.

As the girl alighted and spoke to him for a moment, he raised the goggles which habitually he wore and I saw his face. A theory which I had formed on the previous night proved correct. The chauffeur was the Hindu, Chunda Lal! As Zara el-Khala walked up the steps he backed the car into the narrow lane and I watched him constantly. Yet, watch as closely as I might, I could not see where he concealed himself in order to command a view of the road.

On this occasion, as I know, Dr. Stuart was at home. Nevertheless, the girl stayed for close upon half an hour, and I began to wonder if some new move had been planned. Suddenly the door opened and she came out.

I crept through the bushes to my bicycle and wheeled it on to the drive. I saw the car start; but Madame Fortune being in playful mood, my own engine refused to start at all, and when ten minutes later I at last aroused a spark of life in the torpid machine I knew that pursuit would be futile.

Since this record is intended for the guidance of those who take up the quest of "The Scorpion" either in co-operation with myself or, in the event of my failure, alone, it would be profitless for me to record my disasters. Very well, I had one success. One night I pursued the yellow car from Dr. Stuart's house to the end of Limehouse Causeway without once losing sight of it.

A string of lorries form the docks, drawn by a traction engine, checked me at the corner for a time, although the yellow car passed. But I raced furiously on and by great good luck overtook it near the Dock Station. From thence onward pursuing a strangely tortuous route, I kept it in sight to Canning Town, when it turned into a public garage. I followed—to purchase petrol.

Chunda Lal was talking to the man in charge; he had not yet left his seat. But the car was empty!

At first I was stupid with astonishment. Par la barbe du prophete! I was astounded. Then I saw that I had really made a great discovery. The street into which I had injudiciously followed "Le Balafre" lay between Limehouse Causeway and Ropemaker Street, and it was at no great distance from this point that I had lost sight of the yellow car. In that street, which according to my friend the policeman was "nearly all Chinese," Zara el-Khala had descended; in that street was "The Scorpion's" lair!

CHAPTER V

CONCLUSION OF STATEMENT

I come now to the conclusion of this statement and to the strange occurrence which led to my proclaiming myself. The fear of imminent assassination which first had prompted me to record what I knew of "The Scorpion" had left me since I had ceased to be Charles Malet. And that the disappearance of "Le Balafre" had been accepted by his unknown chief as evidence of his success in removing me, I did not doubt. Therefore I breathed more freely … and more freely still when my body was recovered!

Yes, my body was recovered from Hanover Hole; I read of it—a very short paragraph, but it is the short paragraphs that matter—in my morning paper. I knew then that I should very shortly be dead indeed— officially dead. I had counted on this happening before, you understand, for I more than ever suspected that "The Scorpion" knew me to be in England and I feared that he would "lie low" as the English say. However, since a fortunate thing happens better late than never, I say in this paragraph two things: (1) that the enemy would cease to count upon Gaston Max; (2) that the Scotland Yard Commissioner would be authorised to open Part First of this Statement which had been lodged at his office two days after I landed in England—the portion dealing with my inquiries in Paris and with my tracking of "Le Balafre" to Bow Road Station and observing that he showed a golden scorpion to the chauffeur of the yellow car.

This would happen because Paris would wire that the identification disk found on the dead man was that of Gaston Max. Why would Paris do so? Because my reports had been discounted since I had ceased to be Charles Malet and Paris would be seeking evidence of my whereabouts. My reports had discontinued because I had learned that I had to do with a criminal organization of whose ramifications I knew nothing. Therefore I took no more chances. I died.

I return to the night when Inspector Dunbar, the grim Dunbar of Scotland Yard, came to Dr. Stuart's house. His appearance there puzzled me. I could not fail to recognize him, for as dusk had fully come I had descended from my top window and was posted among the bushes of the empty house from whence I commanded a perfect view of the doctor's door. The night was unusually chilly—there had been some rain—and when I crept around to the lane bordering the lawn, hoping to see or hear something of what was taking place in the study, I found that the windows were closed and the blinds drawn.

Luck seemed to have turned against me; for that night, at dusk, when I had gone to a local garage where I kept my motor bicycle, I had discovered the back tire to be perfectly flat and had been forced to contain my soul in patience whilst the man repaired a serious puncture. The result was of course that for more than half an hour I had not had Dr. Stuart's house under observation. And a hundred and one things can happen in half an hour.

Had Dr. Stuart sent for the Inspector? If so, I feared that the envelope was missing, or at any rate that he had detected Zara el-Khala in the act of stealing it and had determined to place the matter in the hands of the police. It was a maddening reflection. Again—I shrewdly suspected that I was not the only watcher of Dr. Stuart's house. The frequency with which the big yellow car drew up at the door a few moments after the doctor had gone out could not be due to accident. Yet I had been unable to detect the presence of this other watcher, nor had I any idea of the spot where the car remained hidden—if my theory was a correct one. Nevertheless I did not expect to see it come along whilst the Inspector remained at the house— always supposing that Zara el-Khala had not yet succeeded. I wheeled out the "Indian" and rode to a certain tobacconist's shop at which I had sometimes purchased cigarettes.

He had a telephone in a room at the rear which customers were allowed to use on payment of a fee, and a public call-box would not serve my purpose, since the operator usually announces to a subscriber the fact that a call emanated from such an office. The shop was closed, but I rang the bell at the side door and obtained permission to use the telephone upon pleading urgency. I had assiduously cultivated a natural gift for mimicry, having found it of inestimable service in the practice of my profession. It served me now. I had worked in the past with Inspector Dunbar and his subordinate Sergeant Sowerby, and I determined to trust to my memory of the latter's mode of speech.

I rang up Dr. Stuart and asked for the Inspector, saying Sergeant
Sowerby spoke from Scotland Yard. "Hullo!" he cried, "is that you,
Sowerby?"

"Yes," I replied in Sowerby's voice. "I thought I should find you there. About the body of Max.."

"Eh!" said Dunbar—"what's that? Max?"

I knew immediately that Paris had not yet wired, therefore I told him
that Paris had done so, and that the disk numbered 49685 was that of
Gaston Max. He was inexpressibly shocked, deploring the rashness of
Max in working alone.

"Come to Scotland Yard," I said, anxious to get him away from the house.

He said he would be with me in a few minutes, and I was racking my brains for some means of learning what business had taken him to Dr. Stuart when he gave me the desired information spontaneously.

"Sowerby, listen," said he: "It's 'The Scorpion' case right enough! That bit of gold found on the dead man is not a cactus stem; it's a scorpion's tail!"

So! they had found what I had failed to find! It must have been attached, I concluded, to some inner part of "Le Balafre's" clothing. There had been no mention of Zara el-Khala; therefore, as I rode back to my post I permitted myself to assume that she would come again, since presumably she had thus far failed. I was right.

Morbleu! quick as I was the car was there before me! But I had not overlooked this possibility and I had dismounted at a good distance from the house and had left the "Indian" in someone's front garden. As I had turned out of the main road I had seen Dr. Stuart and Inspector Dunbar approaching a rank upon which two or three cabs usually stood.

I watched la Bell Zara enter the house, a beautiful woman most elegantly attired, and then, even before Chunda Lal had backed the car into the lane I was off … to the spot at which I had abandoned my motor bicycle. In little more than half an hour I had traversed London, and was standing in the shadow of that high, blank wall to which I have referred as facing a row of wooden houses in a certain street adjoining Limehouse Causeway.

You perceive my plan? I was practically sure of the street; all I had to learn was which house sheltered "The Scorpion"!

I had already suspected that this night was to be for me an unlucky night. Nom d'un p'tit bon-homme! it was so. Until an hour before dawn I crouched under that wall and saw no living thing except a very old Chinaman who came out of one of the houses and walked slowly away. The other houses appeared to be empty. No vehicle of any kind passed that way all night.

Turning over in my mind the details of this most perplexing case, it became evident to me that the advantages of working alone were now outweighed by the disadvantages. The affair had reached a stage at which ordinary police methods should be put into operation. I had collected some of the threads; the next thing was for Scotland Yard to weave these together whilst I sought for more.

I determined to remain dead. It would afford me greater freedom of action. The disappearance of "Le Balafre" which must by this time have been noted by his associates, might possibly lead to a suspicion that the dead man was not Gaston Max; but providing no member of "The Scorpion" group obtained access to the body I failed to see how this suspicion could be confirmed. I reviewed my position.

The sealed letter had achieved its purpose in part. Although I had failed to locate the house from which these people operated, I could draw a circle on the map within which I knew it to be; and I had learned that Zara el-Khala and the Hindu were in London. What it all meant—to what end "The Scorpion" was working I did not know. But having learned so much, be sure I did not despair of learning more.

It was now imperative that I should find out exactly what had occurred at Dr. Stuart's house. Accordingly I determined to call upon the Inspector at Scotland Yard. I presented myself towards evening of the day following my vigil in Limehouse, sending up the card of a Bureau confrere, for I did not intend to let it be generally known that I was alive.

Presently I was shown up to that bare and shining room which I remembered having visited in the past. I stood just within the doorway, smiling. Inspector Dunbar rose, as the constable went out, and stood looking across at me.