It wasn't that he wanted his friends, Beverley and Gillingham, to be asleep before he started on his business at the pond; all that he wanted was to be sure that they were safely in their bedrooms. Cayley's business would make no noise, give no sign, to attract the most wakeful member of the household, so long as the household was really inside the house. But if he wished to reassure himself about his guests, he would have to wait until they were far enough on their way to sleep not to be disturbed by him as he came up to reassure himself. So it amounted to the same thing, really. He would wait until they were asleep.... until they were asleep.... asleep....
With a great effort Bill regained the mastery over his wandering thoughts and came awake again. This would never do. It would be fatal if he went to sleep.... if he went to sleep.... to sleep .... And then, in an instant, he was intensely awake. Suppose Cayley never came at all!
Suppose Cayley was so unsuspicious that, as soon as they had gone upstairs, he had dived down into the passage and set about his business. Suppose, even now, he was at the pond, dropping into it that secret of his. Good heavens, what fools they had been! How could Antony have taken such a risk? Put yourself in Cayley's place, he had said. But how was it possible? They weren't Cayley. Cayley was at the pond now. They would never know what he had dropped into it.
