In the first and third of these cases, suspicion seemed to point at once to some member of the household; but all my inquiries failed to find any trace of the missing property. The servants all willingly consented, nay, even offered, to have their boxes searched, and for some weeks I confessed myself baffled. The missing property had disappeared as completely as though it had never existed.

Again and again I went over the whole circumstances as they had been related to me. There was, I reflected, one circumstance common to all three of the robberies, if robberies they were. There had been at the time some unusual amount of confusion, all lending opportunity for a theft to take place without immediate detection. The Dowager Lady A.’s diamonds had been stolen during her illness, or about the time of her death. The Countess of B. had lost her diamonds during the excitement of a wedding breakfast at an hotel. At Colonel C.’s house, there had been a ball on the night when the bracelet was lost. Was there any one, I asked myself, who, by chance or intention, had been present at each place at the time of the robbery? Any occasional waiter, for example, or servant of any kind? I could not find that there had been. Yet, if the thief were not one of the household, how was it that a stranger should in three separate instances fix on an establishment where the circumstances were favourable to a robbery of valuable property? In two cases, there had been illness and a hasty summoning of doctors. That led to another thought: was it possible that some experienced thief or gang of thieves had laid themselves out to track the broughams of fashionable West-end physicians, on the chance of finding hall doors left open, and property somewhat loosely guarded?

I had not thought of such a thing seriously before; but it seemed now to be an idea worth following up. Once more I resumed inquiries. Who was the doctor summoned in the case of the Dowager Lady A.? I easily ascertained. It was one of the best known men, at that time, in London. He and his brougham would be familiar to every thief who frequented West-end thoroughfares. I next inquired at Colonel C.’s. To my satisfaction, I learnt that the same doctor had attended in this case. ‘Here,’ I said to myself, ‘I begin to see daylight.’ Shortly afterwards, I made a further discovery. The coachman who drove the famous physician to Lady A.’s on the night of the accident, and to Colonel C.’s on the night of the ball, had only been in his employ a few weeks; and on the date of the Earl of B.’s wedding, the man had driven the carriage of one of the guests at the breakfast.

The clue I felt was becoming strong. The thief, I grew convinced, was a confederate of the grave-faced man in spotless black who drove the fashionable doctor from one house of sickness to another. I resolved to obtain an interview with the doctor, and after explaining my suspicions, plan some mode of detecting so consummate a rascal. Circumstances occurred to make me resolve to carry out my purpose without delay.

My journey took me to one of the somewhat sombre-looking streets that run down to the Thames, from the Chelsea side, between Chelsea Bridge and Battersea Bridge. The name ‘Gideon West, M.D., Physician and Surgeon,’ inscribed on a brass plate told me when I had reached my destination. Dr West, I was informed, was still out, late though it was; and the time of his coming home was most uncertain. I was determined, however, not to return without seeing him; and after assuring the tired-looking servant that I should certainly await Dr West’s return, even if I had to spend the night on the doorstep, I was shown into the consulting-room, where a wood-fire was still burning on the hearth. Seating myself in an armchair with a high screen behind me, I settled down to my vigil, however long it might be.

I had often noticed the house; for who did not feel some interest in so famous a medical man as Gideon West? Why he had chosen such a house I did not learn until afterwards; but I knew it was an old-fashioned, rambling sort of place, with a room built on here at one time, and there at another time. Windows had been blocked up at one place, and windows had been let in at another. In fact, it was a house that seemed to defy a stranger to explain upon what rule, or what want of rule, it had been so constructed.

Those who first heard of Gideon West as one of the most famous physicians in London, asked in astonishment how he could live in such a ramshackle-looking building. Perhaps they forgot that even famous doctors were not born famous. Gideon West, when he entered on his professional career, was anything but famous, and he was as poor as he well could be. Father and mother were dead, brothers and sisters he had none. An almost forgotten god-mother had, to his surprise, left him the old house at Chelsea. This was about the time he received his diploma. Thereupon, Gideon West married, for love, a girl without a penny, settled himself in his new possession, had the brass plate affixed to the door, and awaited the patients who were to prove his skill and make his fortune. It was a weary waiting; but the young bride had unlimited trust in her husband, and Gideon West never for an instant lost faith in himself. Slowly, very slowly, a small practice grew upon his hands; but the struggle that only braced Gideon West for the battle of life proved too terrible for the frail young wife. But there was no complaining, no repining, no word to tell of doubt, much less of despair, and Gideon West battled on. He knew, as though it had already come, that he should at last prevail. He had measured his own strength, and felt that he could trust it. But—and it was that but alone which troubled him—suppose he should have to wait years and years—suppose, as those years went by, he should see the colour pale on the face he loved; the brightness fade from the eyes he delighted to gaze into—suppose his long years of waiting were marked in the lines on his wife’s young face—suppose when the golden gates of fortune flew open, he should find it was—too late!

How long I sat dreaming in Dr West’s room, I know not; but it is certain I must have fallen asleep before the crackling embers. When I awoke, I found myself in all but darkness. The gas had been lowered, and only a flickering glow from the dying fire remained to cast drear and fantastic shadows on the ceiling. Many hours must have passed. I must have been forgotten when the servants retired to rest, and Dr West either had not returned, or had not been made aware of my presence. My position was embarrassing. To wake up in the middle of the night and to find myself in a strange house, was a new experience. I groped about the room and felt for the door by which I had entered. It was locked. Bell of any sort I could find none. I tried to raise my voice; but the death-stillness and darkness of the room seemed to stifle me. I found the window, and looked out. It opened high above a courtyard closed in by walls. Again I tried the door. Then I remembered that it was a sort of passage-room; that there was a door leading from it to an apartment beyond. I managed to find this door, covered as it was with heavy tapestry hangings. Feeling very much like a thief, I tried the handle. It turned in my hand, and the door yielded noiselessly. Beyond, I saw a large square chamber, evidently a bedroom; but the bed was unoccupied. It was a quaint and haunted-looking room, with high oaken skirting and panelled ceiling. A couple of candles burned on the dressing-table, and threw a faint light over the dark furniture and the tapestries that hung against the walls.

Once more I tried to call out; but my tongue seemed dried up, and my voice refused to be heard. Presently, to my relief I heard a human voice. It evidently came from an apartment beyond the one into which I had ventured. Impelled, I hardly knew how, I resolved to venture farther; and as my footsteps fell noiselessly on the thick carpet, I could hardly believe I was not wandering in a dream through the mysterious chambers of the dead.

Yet more and more distinctly I heard the sad low voice that had caught my ear; and I approached stealthily, and I confess with something like awe, the door, which, as I perceived, opened from the bedroom to the chamber whence the voice proceeded. Here, as before, a curtain of antique tapestry, reaching from the ceiling to the floor, concealed the aperture; and trying cautiously the door, I found that it opened towards me. This gave me time to reflect before intruding, with stealthy steps, in the dead of night, into the privacy of this innermost chamber. Like a guilty creature, I stood and listened. The voice—for there seemed to be but one—was close at hand. It was a strangely melancholy voice, yet possessing a fascinating power that chained me to the spot.