Summerlee had been so interested that he had stood unresisting while Challenger tilted his head into the air. Now he shook his colleague off and came back to his dignity.

“I should be glad, Professor Challenger,” said he, “if you could see your way to make any remarks which may occur to you without seizing me by the chin. Even the appearance of a very ordinary rock python does not appear to justify such a liberty.”

“But there is life upon the plateau all the same,” his colleague replied in triumph. “And now, having demonstrated this important conclusion so that it is clear to anyone, however prejudiced or obtuse, I am of opinion that we cannot do better than break up our camp and travel to westward until we find some means of ascent.”