He wondered if his gardener had remembered what he had told him about the flower-beds in front of his house; he wanted certain changes made which Margaret had suggested.

He tried to keep his mind on the flower-beds, but it drifted away to the cave below.

He began to wonder if he would come to some underground body of water where he would be drowned; but he knew that was a silly thought.

If the shaft had gone through subterranean reservoirs, the water of these would have run out, and before they reached the bottom of the shaft would have dissipated into mist.
Down, down he went.

He looked at his watch; he had been in that car only an hour and a half.