The shock at its discovery caused me to start, but next instant I smoothed out the antimacassar into its former place without attracting any attention, and passed across the room with the motive of inspecting an object which I well remembered discovering when I had made my blind search. Upon a pedestal of black marble stood an exquisite little statuette of a Neapolitan dancing-woman, undoubtedly the work of some Italian master. Without pausing to examine it, I took in its every detail as I passed. It was exactly as I had felt it, and in the self-same spot as on that fatal night. Beside the couch, as I turned again to look, I saw that a large skin rug had been thrown down. Without doubt it had been placed there to conceal the ugly stain of blood upon the carpet. And yet there, on the scene of one of the foulest and most cowardly assassinations, we were actually spending the evening quietly, as became a respectable household. The thing seemed absolutely incredible. A dozen times I endeavoured to persuade myself that the whole discovery was but a chimera, arising from my disordered imagination. Nevertheless, it was impossible to disguise from myself the fact that in every detail the truth was borne out. In that very room the unknown man had been struck dead. The marks of his blood still remained as evidence of the truth. I saw that beside the high lamps at that moment in use, there was a magnificent candelabra suspended from the ceiling, and in this were electric lamps. Then, at the door, I noticed the switch, and knew that it was the same which I had heard turned off by the assassin before leaving the house. At the end of the room, too, were the folding doors, now concealed by curtains. It was through those very doors that Edna, my mysterious protectress, had passed and repassed to that inner room whence had come the sound of champagne being uncorked and the woman's piercing scream. Mabel leaned over and spoke to me, whereupon I sank again into the chair I had previously occupied. She began to chat, but although her beautiful eyes held me fixed, and her face seemed more handsome than any I had ever seen, the diamonds in her hair dazzled my eyes, and I fear that my responses were scarcely intelligible. "You are not quite yourself to-night, I think," she remarked at last, rising from the piano, and taking the low chair that I drew up for her. "Are you unwell?" "Why?" I asked, laughing. "Because you look rather pale. What's the matter?" "Nothing," I answered, as carelessly as I could. "A slight headache. But it has passed now." My eyes wandered to those curtains of green plush. How I longed to enter that room beyond!