"We ought to be able to hold them back," put in the doctor. "Can't we hurl them into the stream as fast as they appear?"
"That's the talk," came from Bob. "Let us line up just this side of the waterfall."
"Perhaps we can scare them," suggested Dave. "I know all savages are very superstitious."
All made their way to the edge of the waterfall, and Pat Stoodles showed them a crack in the rocks, at the side of the falls.
Here they could see the savages lined up outside, with Chief Walru at their head.
Several were talking excitedly, and the chief was wading in the water at the very foot of the falls.
Now the chief took up a rock and hurled it into the waterfall.
It whizzed past Doctor Barrell and struck the flooring some distance to the rear of the cave.
Dave saw the movement, and of a sudden a strange idea came into his head.
He would scare the savages if he could.