The boy could not crawl out.

The hole between the rocks was not big enough.
"Timoteo!" screamed a voice, and Timoteo recognized Herbert.
"Say!" Herbert called, "run for help, won't you?
I was out here abalone-hunting, and I guess one of these big rocks must have been poised just right to topple over.

Anyhow, in climbing down here I managed to topple it.

It didn't fall on me, but it fell against the other rocks so that there isn't room for me to crawl out of here! I can't make the rock budge, now.

And the tide's coming! I thought I'd drown, away out here, alone.