We went back to the house, and Gertrude, who was more like herself since her talk with Halsey, sat down at the mahogany desk in the living-room to write a letter. Halsey prowled up and down the entire east wing, now in the card-room, now in the billiard-room, and now and then blowing his clouds of tobacco smoke among the pink and gold hangings of the drawing-room. After a little I joined him in the billiard-room, and together we went over the details of the discovery of the body. The card-room was quite dark. Where we sat, in the billiard-room, only one of the side brackets was lighted, and we spoke in subdued tones, as the hour and the subject seemed to demand. When I spoke of the figure Liddy and I had seen on the porch through the card-room window Friday night, Halsey sauntered into the darkened room, and together we stood there, much as Liddy and I had done that other night. The window was the same grayish rectangle in the blackness as before. A few feet away in the hall was the spot where the body of Arnold Armstrong had been found. I was a bit nervous, and I put my hand on Halsey’s sleeve. Suddenly, from the top of the staircase above us came the sound of a cautious footstep. At first I was not sure, but Halsey’s attitude told me he had heard and was listening. The step, slow, measured, infinitely cautious, was nearer now. Halsey tried to loosen my fingers, but I was in a paralysis of fright. The swish of a body against the curving rail, as if for guidance, was plain enough, and now whoever it was had reached the foot of the staircase and had caught a glimpse of our rigid silhouettes against the billiard-room doorway. Halsey threw me off then and strode forward. “Who is it?” he called imperiously, and took a half dozen rapid strides toward the foot of the staircase. Then I heard him mutter something; there was the crash of a falling body, the slam of the outer door, and, for an instant, quiet. I screamed, I think. Then I remember turning on the lights and finding Halsey, white with fury, trying to untangle himself from something warm and fleecy. He had cut his forehead a little on the lowest step of the stairs, and he was rather a ghastly sight. He flung the white object at me, and, jerking open the outer door, raced into the darkness. Gertrude had come on hearing the noise, and now we stood, staring at each other over—of all things on earth—a white silk and wool blanket, exquisitely fine! It was the most unghostly thing in the world, with its lavender border and its faint scent. Gertrude was the first to speak. “Somebody—had it?” she asked. “Yes. Halsey tried to stop whoever it was and fell. Gertrude, that blanket is not mine. I have never seen it before.” She held it up and looked at it: then she went to the door on to the veranda and threw it open. Perhaps a hundred feet from the house were two figures, that moved slowly toward us as we looked.