Entering the library, I lit the gas as Sinclair had requested. Then I tried the conservatory door. It was unlocked. Casting a sharp glance around, I made sure that the lounges were all unoccupied and that I could safely leave Sinclair to hold his contemplated interview without fear of interruption. Then, dreading a premature arrival on his part, I slid quickly out and moved down the hall to where the light of the one burning jet failed to penetrate. "I will watch from here," thought I, and entered upon the quick pacing of the floor which my impatience and the overwrought condition of my nerves demanded. But before I had turned on my steps more than half a dozen times, the single but brilliant ray coming from some half-open door in the rear caught my eye, and I had the curiosity to step back and see if any one was sharing my watch. In doing so I came upon the little spiral staircase which, earlier in the evening, Sinclair had heard creak under some unknown footstep. Had this footstep been Dorothy's, and if so, what had brought her into this remote portion of the house? Fear? Anguish? Remorse? A flying from herself or from _it_? I wished I knew just where she had been found by the two young persons who had brought her back into her aunt's room. No one had volunteered the information, and I had not seen the moment when I felt myself in a position to demand it. Proceeding further, I stood amazed at my own forgetfulness. The light which had attracted my attention came from the room devoted to the display of Miss Murray's wedding-gifts. This I should have known instantly, having had a hand in their arrangement. But all my faculties were dulled that night, save such as responded to dread and horror. Before going back I paused to look at the detective whose business it was to guard the room. He was sitting very quietly at his post, and if he saw me he did not look up. Strange that I had forgotten this man when keeping my own vigil above. I doubted if Sinclair had remembered him either. Yet he must have been unconsciously sharing our watch from start to finish; must even have heard the cry as only a waking man could hear it. Should I ask him if this was so? No. Perhaps I had not the courage to hear his answer. Shortly after my return into the main hall I heard steps on the grand staircase. Looking up, I saw the two girls descending, followed by Sinclair. He had been successful, then, in inducing Dorothy to come down. What would be the result? Could I stand the suspense of the impending interview?