“As with all truly wild things, care is necessary in approaching them. Stealth is useless. Wild things recognize stealth for what it is, a lie and a trap. While wild things might play games of stealth, and in doing so may even occasionally fall prey to stealth, they are never truly caught by it.”
“They can very seldom pick up a livelihood by stealing […], although I confess they learn the rudiments much earlier, during which time they can however be properly looked upon only as probationers […] as I have been informed by a principal gentleman in the country of Cavan”
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.