"He may be out," I muttered. "I'll ring for the housekeeper." To fetch Mrs Hyems up from her basement took more time, but at last she appeared, and a look of mingled perplexity and relief came into the eyes that met mine. "Mr Rose?" I said. "Aren't you the gentleman as came last night, sir?" she said. "Didn't he go out with you? I heard you come down; about eleven o'clock it would be; and he didn't seem to be not a minute after you----" "Hasn't he been back since?" "I can't make it out, sir. He hasn't been to bed, and there was a note for me on his table this morning. Paid all up he has, but not a word about his milk nor his washing nor his letters nor when he's coming back. And he left his door open, which that isn't his way. Perhaps you'd like to come up, sir?" We followed her up the stairs. His door still stood wide open, and as far as I could see his room was exactly as I had left it last night. The medicine-ball still lay where it had rolled on the floor, the cushions of the sofa still bore the imprint of his body. I turned to the caretaker. "You say he's paid you, Mrs Hyems?" "To the end of the week, sir, except for his washing and ceterer." "And he's left no address?" "No more than I tell you, sir." "Then," I said briskly, "I should just tidy his room and close his door. He'll probably be back to-night. If he isn't let me know. Here's my address." But as I said it I seemed to see again those marks where his name-plate had been. Derry always carried, suspended in his trousers-pocket by a little swivelled thong, one of those fearsome-looking compendium knives that consist of half a dozen tools in one. The plate had not been unscrewed; what he had done had been to thrust one of these blades behind it and to rip it bodily from its bed. I pictured it all only too clearly. Myself carefully watched out of the way--a cheque hurriedly written--a gulp of whisky perhaps and the call of the streets--a dash downstairs with his door left open behind him--a minute's feverish work over the plate.... He had left his books, his papers, his furniture, his medicine-ball. But his name he had taken away, and I did not think that those rooms in Cambridge Circus would see Derwent Rose's face any more. PART II THE STERN CHASE I _Lost_: A man with a brass name-plate in his pocket, probably bent in wrenching. Personal appearance difficult to describe, because something has happened to him that does not happen to the generality of people. When last seen appeared to be about thirty-five, but may look younger. Was wearing dark blue suit and shirt with torn neckband.