For answer the Professor took a book down from a shelf.
"This is an excellent monograph by my gifted friend, Ray Lankester!" said he. "There is an illustration here which would interest you. Ah, yes, here it is! The inscription beneath it runs: 'Probable appearance in life of the Jurassic Dinosaur Stegosaurus. The hind leg alone is twice as tall as a full-grown man.' Well, what do you make of that?"
He handed me the open book. I started as I looked at the picture. In this reconstructed animal of a dead world there was certainly a very great resemblance to the sketch of the unknown artist.
"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 cartilege 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.
