"He was, understand well, not for an instant deceived. He knew thoroughly what we were doing, for what we were searching. He knew also that nowhere in Europe would he dare to attempt to sell a single one of those jewels. We suspected that he would attempt to bring them to this country, and we warned your department of customs. For we knew that here he could sell all but the very largest not only almost without danger, but at a price far greater than he could obtain for them in Europe. We closed every avenue to him, as we thought—and then, all at once, he disappeared.

"For two weeks we heard nothing—then came the story of this man Drouet, killed by a stab on the hand. At once we recognised the work of Crochard, for he alone of living men possesses the secret of the poison of the Medici. It is a fearful secret, which, in his whole life, he had used but once—and that upon a man who had betrayed him."

M. Pigot paused and passed his hand across his forehead.

"We were at a loss to understand Crochard's connection with Drouet," M. Pigot continued. "Drouet, while a mere hanger-on of the cafés of the boulevards, was not a criminal. Then came the death of that creature Morel, in an effort to gain possession of this cabinet, and we began to understand. We made inquiries concerning the cabinet; we learned its history, and the secret of its construction, and we arrived at a certain conclusion. It was to ascertain if that conclusion is correct that I came to America."

"What is the conclusion?" queried Grady, who had listened to all this with a manifest impatience in strong contrast to my own absorbed interest.

For I had already guessed what the conclusion was, and my pulses were bounding with excitement. "Our theory," replied M. Pigot, without the slightest acceleration of speech, "is that the Michaelovitch diamonds are concealed in this cabinet. Everything points to it—and we shall soon see." As he spoke, he drew from his pocket a steel gauntlet, marvellously like the one Godfrey had used, and slipped it over his right hand. "When one attempts to fathom the secrets of L'Invincible" he said with a smile, "one must go armoured. Already three men have paid with their lives the penalty of their rashness." "Three men!" repeated Grady, wonderingly. "Three," and Pigot checked them off upon his fingers. "First the man who gave his name as d'Aurelle, but who was really a blackmailer named Drouet; second, M. Vantine, the connoisseur; and third, the creature Morel. Of these, the only one that really matters is M. Vantine; his death was most unfortunate, and I am sure that Crochard regrets it exceedingly. He might also regret my death, but, at any rate, I have no wish to be the fourth. Not I," and he adjusted the gauntlet carefully. "One moment, monsieur," I said, bursting in, unable to remain longer silent. "This is all so wonderful—so thrilling—will you not tell us more? For what were these three men searching? For the jewels?" "Monsieur is as familiar with the facts as I," he answered, in a sarcastic tone. "He knows that Drouet was killed while searching for a packet of letters, which would have compromised most seriously a great lady; he knows that M. Vantine was killed while endeavouring to open the drawer after its secret had been revealed to him by the maid of that same great lady, who was hoping to get a reward for them; Morel met death directly at the hands of Crochard because he was a traitor and deserved it." More and more fascinated, I stared at him. What secret was safe, I asked myself, from this astonishing man? Or was he merely piecing together the whole story from such fragments as he knew? "But even yet," I stammered, "I do not understand. We have opened the secret drawer of the cabinet—there was no poison. How could it have killed Drouet and Mr. Vantine?"

"Very simply," said M. Pigot, coldly. "Death came to Drouet and M. Vantine because the maid of Madame la Duchesse mistook her left hand for her right. The drawer which contained the letters is at the left of the cabinet—see," and he pressed the series of springs, caught the little handle, and pulled the drawer open. "You will notice that the letters are gone, for the drawer was opened by Madame la Duchesse herself, in the presence of M. Lestaire, who very gallantly permitted her to resume possession of them. The drawer which Drouet and M. Vantine opened," and here his voice became a little strident under the stress of great emotion, "is on the right side of the cabinet, exactly opposite the other, and opened by a similar combination. But there is one great difference. About the first drawer, there is nothing to harm any one; the other is guarded by the deadliest poison the world has ever known. Observe me, gentlemen!" Impelled by an excitement so intense as to be almost painful, I had risen from my chair and drawn near to him. As he spoke, he bent above the desk and pressed three fingers along the right edge. There was a sharp click, and a section of the inlay fell outward, forming a handle, just as I had seen it do on the other side of the desk. M. Pigot hesitated an instant—any man would have hesitated before that awful risk!—then, catching the handle firmly with his armoured hand, he drew it quickly out. There was a sharp clash, as of steel on steel, and the drawer stood open.

CHAPTER XXV

THE MICHAELOVITCH DIAMONDS

M. Pigot, cool and imperturbable, held out to us, with a little smile, a hand which showed not a quiver of emotion—his gauntleted hand; and I saw that, on the back of it, were two tiny depressions. At the bottom of each depression lay a drop of bright red liquid— blood-red, I told myself, as I stared at it, fascinated. And what nerves of steel this man possessed! A sudden warmth of admiration for him glowed within me. "That liquid, gentlemen," he said in his smooth voice, "is the most powerful poison ever distilled by man. Those two tiny drops would kill a score of people, and kill them instantly. Its odour betrays its origin"—and, indeed, the air was heavy with the scent of bitter almonds—"but the poison ordinarily derived from that source is as nothing compared with this. This poison is said to have been discovered by Rémy, the remarkable man who brought about the death of the Duc d'Anjou. Its distillation was supposed to be one of the lost arts, but the secret was rediscovered by this man Crochard. No secret, indeed, is safe from him; criminal history, criminal memoirs—the mysteries and achievements of the great confederacy of crime which has existed for many centuries, and whose existence few persons even suspect—all this is to him an open book. It is this which renders him so formidable. No man can stand against him. Even the secret of this drawer was known to him, and he availed himself of it when need arose." M. Pigot paused, his head bent in thought; and I seemed to be gazing with him down long avenues of crime, extending far into the past—dismal avenues like those of Père Lachaise, where tombs elbowed each other; where, at every step, one came face to face with a mystery, a secret, or a tragedy. Only, here, the mysteries were all solved, the secrets all uncovered, the tragedies all understood. But only to the elect, to criminals really great, were these avenues open; to all others they were forbidden. Alone of living men, perhaps, Crochard was free to wander there unchallenged.