Here goes, though.

I can't stay like this." Mike stood gazing down at the bushes, trembling with anxiety as he heard a rustling and scraping sound beneath, which made him long to speak and ask questions about how his companion got on, but he feared to do so lest he should take his attention from the work he had on hand.

Then came the rattle of a falling stone going slowly down, as if there were a good, steady slope; and the boy listened for its plunge into water far beneath, but the falling of the stone ceased to be heard, while the rustling and scraping sound made by the climber increased.

Then all at once the bushes began to move and a hand appeared at the far end.
"Take care! pray take care!" cried Mike.

"Don't--pray don't slip back!" "Oh, it's all right now," said Vince, to the watcher's great relief.
"It's all of a slope here, as if it had once been a place where water ran down.