My small stock of knowledge was exhausted.
"I really do not know," said I.
He opened the standard work to which he had already referred me.
"Here," said he, pointing to the picture of an extraordinary flying monster, "is an excellent reproduction of the dimorphodon, or pterodactyl, a flying reptile of the Jurassic period. On the next page is a diagram of the mechanism of its wing. Kindly compare it with the specimen in your hand."
A wave of amazement passed over me as I looked. I was convinced. There could be no getting away from it. The cumulative proof was overwhelming. The sketch, the photographs, the narrative, and now the actual specimen—the evidence was complete. I said so—I said so warmly, for I felt that the Professor was an ill-used man. He leaned back in his chair with droopi
