He drew from his pocket a "combination" knife containing, among other implements, a screw-driver, with which he carefully extracted the screws from one of the little brass plates by which the frame had been suspended from the nails.
"You see," he said, when he had removed the plate and carried the photograph over to the gas-jet, "the wood covered by the plate is as dirty and time-stained as the rest of the frame. The plates have been put on recently."
"And what are we to infer from that?"
"Well, since there are no other marks of plates or rings upon the frame, we may safely infer that the photograph was never hung up until it came to these rooms."
"Yes, I suppose we may. But what then? What inference does that lead to?"
Thorndyke reflected for a few moments and I continued:
"It is evident that this photograph suggests more to you than it does to me. I should like to hear your exposition of its bearing on the case, if it has any."
"Whether or no it has any real bearing on the case," Thorndyke answered, "it is impossible for me to say at this stage. I told you that I had proposed to myself one or two hypotheses to account for and explain Jeffrey Blackmore's will, and I may say that the curious misplacement of this photograph fits more than one of them. I won't say more than that, because I think it would be profitable to you to work at this case independen-
