“Then you admit you stained your hands with blood?” Trethowen exclaimed anxiously.

“Yes, yes; but don’t shrink from me,” he cried, in a beseeching tone. “It was for her sake—for Valérie’s sake. Prompted by the beautiful woman, whose loveliness maddened me, I took my rival’s life. You will keep my secret, I know, so I will tell you how it came about. We were seated late one night in the Chat Noir, when she told me she had discovered that Nicholson and I were friends. I was not surprised, for I had anticipated that sooner or later she would find this out: but in the conversation which ensued I reproached her for continuing her intrigue with him. The words I uttered appeared to cause her a fit of remorse, for she protested that it was through no fault of hers, but under absolute compulsion. She declared that this man was in possession of a secret which, if divulged, would ruin her, and hence he held power over her which made it imperative that she should continue the relationship even against her will. We went out and wandered along the deserted streets. With such terrible earnestness did she speak, entreating pity, and asserting her affection for me, that, like a blind, trusting imbecile that I was, I believed her. Indeed, it was evident that whatever love she had entertained for Nicholson had turned to hate. The remembrance of that night is so confused that I can scarce recollect the words I uttered. However, it was she who suggested the crime, for she assured me that if he died she would be willing to marry me. What greater incentive could a jealous lover have to kill the man who barred his happiness? In the few days that followed I tried to tear myself away from her; yet still I was drawn towards her, and at last Valérie—your wife—and I sat together one night actually plotting his death. Blindly I resigned myself to a fate worse than that of the doomed. I promised to murder him!”

He spoke in low, hoarse tones, and gazed around the dimly-lit studio with a bewildered, frightened expression in his haggard eyes.

Trethowen stood by him in silent wonder, waiting for him to continue.

“I deemed that by striking the blow I should be rendering her a service as well as securing our mutual felicity. I did not know that I was preparing a living torture for myself, that I was resigning every hope, joy, and sentiment that makes life precious. No; in my frame of mind, with my intense hatred excited by the words of the woman I loved, I thought naught of the enormity of the crime, and only regarded the deed as a justifiable means of ridding her of an obnoxious and unholy tie. She planned the crime with care and forethought, even arranging the day, the hour, the moment, that it should be committed. But there—why should I blame her when it is I who was the coward, the criminal? You will understand when I say that at ten o’clock one night I softly ascended the stairs from the boulevard, and cautiously entered Nicholson’s apartments by means of a key provided by Valérie. Passing along a short, dark passage, I saw a light coming through the chinks of the door which led into the front room that he used as a library and office. In this room was the safe in which he kept his gems, cunningly concealed behind a mock bookcase, so that anyone entering saw nothing of the great green iron doors with shining brass handles. Scarcely daring to breathe, I pushed open the door of this room, and saw my victim seated at his writing-table with his back towards me. The cosy apartment was in comparative darkness, except for the shaded reading-lamp which shed a subdued light in the vicinity of the table. My rival had evidently only just come in, for he had not removed his Inverness coat, and was apparently engrossed in a sheet of accounts he had spread out before him. At first I faltered, but my hand struck the handle of the long, keen, surgeon’s knife with which I had armed myself. Its touch gave me courage; in a moment I remembered all that I should gain by striking the fatal blow. It was enough! I crept up behind him stealthily, and, lifting the knife, buried it almost up to the hilt in his back! He fell forward dead, without a groan.”

The artist sat pale and trembling, with a clammy moisture upon his brow.

“Only for a moment I stood regarding my foul handiwork, then I turned and made my way cautiously out, descending to the boulevard and walking as fast as I could to a small café on the other side of the Seine, where I spent the remainder of the evening in drinking cognac.”

“And what of Valérie?” asked Hugh, eager to learn the whole of this almost incredible story. “Did she keep her promise?”

“No, curse her! Two days later, when all Paris was discussing what the papers called the ‘Mystery of the Boulevard Haussmann.’ I met her, and asked her to redeem her promise and become mine. But she only laughed and treated me with scorn, urging me to leave the city, and announcing her own departure, saying that she was afraid that the police would ascertain her relations with the murdered man, and interrogate her. In vain I implored her to allow me to accompany her, but she refused, and with a cold, formal farewell left me. The sudden change which had come over her was extraordinary, as likewise was the mysterious manner in which she afterwards disappeared. With a broken heart and a heavy burden of guilt, I, too, fled from Paris—anywhere—everywhere. By-and-by I found consolation in my Art—but no ambition. There was a gloomy, morbid pleasure in trying to catch and reproduce those divine lineaments which hid so bad a spirit. And so I wandered from place to place in Italy, in Spain, in Germany, until I returned to London.”

“When did you next meet her?” inquired Trethowen.