I faced the stairway that led up to the back hall of the house, when to my astonishment, steps sounded behind me and, turning, I saw, coming toward me, a man carrying a lantern. I marked his careless step; he was undoubtedly on familiar ground. As I watched him he paused, lifted the lantern to a level with his eyes and began sounding the wall with a hammer. Here, undoubtedly, was my friend Morgan,—again! There was the same periodicity in the beat on the wall that I had heard in my own rooms. He began at the top and went methodically to the floor. I leaned against the wall where I stood and watched the lantern slowly coming toward me. The small revolver with which I had fired at his flying figure in the wood was in my pocket. It was just as well to have it out with the fellow now. My chances were as good as his, though I confess I did not relish the thought of being found dead the next morning in the cellar of my own house. It pleased my humor to let him approach in this way, unconscious that he was watched, until I should thrust my pistol into his face. His arms grew tired when he was about ten feet from me and he dropped the lantern and hammer to his side, and swore under his breath impatiently. Then he began again, with greater zeal. As he came nearer I studied his face in the lantern’s light with interest. His hat was thrust back, and I could see his jaw hard-set under his blond beard. He took a step nearer, ran his eyes over the wall and resumed his tapping. The ceiling was something less than eight feet, and he began at the top. In settling himself for the new series of strokes he swayed toward me slightly, and I could hear his hard breathing. I was deliberating how best to throw myself upon him, but as I wavered he stepped back, swore at his ill-luck and flung the hammer to the ground. “Thanks!” I shouted, leaping forward and snatching the lantern. “Stand just where you are!” With the revolver in my right hand and the lantern held high in my left, I enjoyed his utter consternation, as my voice roared in the corridor. “It’s too bad we meet under such strange circumstances, Morgan,” I said. “I’d begun to miss you; but I suppose you’ve been sleeping in the daytime to gather strength for your night prowling.” “You’re a fool,” he growled. He was recovering from his fright,—I knew it by the gleam of his teeth in his yellow beard. His eyes, too, were moving restlessly about. He undoubtedly knew the house better than I did, and was considering the best means of escape. I did not know what to do with him now that I had him at the point of a pistol; and in my ignorance of his motives and my vague surmise as to the agency back of him, I was filled with uncertainty. “You needn’t hold that thing quite so near,” he said, staring at me coolly. “I’m glad it annoys you, Morgan,” I said. “It may help you to answer some questions I’m going to put to you.”