“That is certainly remarkable,” said I.

“But you won’t admit that it is final?”

“Surely it might be a coincidence, or this American may have seen a picture of the kind and carried it in his memory. It would be likely to recur to a man in a delirium.”

“Very good,” said the Professor, indulgently; “we leave it at that. I will now ask you to look at this bone.” He handed over the one which he had already described as part of the dead man’s possessions. It was about six inches long, and thicker than my thumb, with some indications of dried cartilage at one end of it.

“To what known creature does that bone belong?” asked the Professor.

I examined it with care and tried to recall some half-forgotten knowledge.

“It might be a very thick human collarbone,” I said.