The pool was fed by a trickle of water from a jumble of rocks at one end.

At the other end the bottom of the pond sloped upward gradually, so that a ramp of smooth rock was formed, emerging out of shallow water.

A stone wall had been built about three feet high to enclose that end of the pond, and all the way along both sides the granite had been broken and chipped until the edges were sheer and unclimbable.
"Look!" he said, pointing.
I looked and grew sick.

On the ramp, half in the water and half out lay about a hundred crocodiles basking in the sun, their yellow eyes all open.

They were aware of us, for they began to move slowly higher out of water as if they expected something.
"You see that post ?" asked Schillingschen.
The stump of a dead tree that he referred to stood up nearly straight out of a crack in the rock, and a few yards above water level.