"What is it? Any animals?"

"No; only this." And George held up an arrow made of flint. The wooden portion of the arrow was really of good workmanship, and of hard, stiff wood.

"Where did you find this?"

"Not more than five hundred feet from here."

Harry looked at the Professor for an explanation, but he was silent. By common consent they now agreed upon making a more extended investigation of the vicinity for other traces, if possible. Within an hour Harry stumbled across the skull of an animal. This was not an unusual sight, as bones had been found at various places in their travels, but here was a specimen, lying on a rocky slope, with but little vegetation about it.


Fig. 2 Types of Arrow-Heads.