minutely and could find no trace of sand, gravel or earth, in spite of the fact that he must have crossed fields and rough land to reach the place where he was found. What I did find was fine tobacco ash, a charred mark as if a cigar or cigarette had been trodden on, several crumbs of biscuit, and, on a projecting brad, some coloured fibres, apparently from a carpet. The manifest suggestion is that the man was killed in a house with a carpeted floor, and carried from thence to the railway."
I was silent for some moments. Well as I knew Thorndyke, I was completely taken by surprise; a sensation, indeed, that I experienced anew every time that I accompanied him on one of his investigations. His marvellous power of co-ordinating apparently insignificant facts, of arranging them into an ordered sequence and making them tell a coherent story, was a phenomenon that I never got used to; every exhibition of it astonished me afresh.
"If your inferences are correct," I said, "the problem is practically solved. There must be abundant traces inside the house. The only question is, which house is it?"
"Quite so," replied Thorndyke; "that is the question, and a very difficult question it is. A glance at that interior would doubtless clear up the whole mystery. But how are we to get that
