[Illustration: A stone arrow head]
"These are bird arrows," the doctor said.
Then he showed large arrows.
"These are for killing buffalo and other big game."
And there were stone axes and hammers. Lastly, the doctor showed him something that looked like a little, very old hatchet. The boy turned it over and over and looked at it. It was all weather stained, and reddish-brown and green.
