No place for men?
Dangerous?
He looked as if he might shin up the waterfall on the spot.

But the guide would not hear of going up, even if there had been any possible method of scaling that sheer cliff, and we had to get back to our party before night.
"They might stay if we told them," I suggested.
But Terry stopped in his tracks.

"Look here, fellows," he said.

"This is our find.

Let's not tell those cocky old professors.