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 Stapleton and Mrs. Laura Lyons, were left with a strong suspicion against Stapleton. Mrs. Stapleton knew that he had designs upon the old man, and also of the existence of the hound. Mrs. Lyons knew neither of these things, but had been impressed by the death occurring at the time of an uncancelled appointment which was only known to him. However, both of them were under his influence, and he had nothing to fear from them. The first half of his task was successfully accomplished, but the more difficult still remained.

“It is possible that Stapleton did not know of the existence of an heir in Canada. In any case he would very soon learn it from his friend Dr. Mortimer, and he was told by the latter all details about the arrival of Henry Baskerville. Stapleton’s first idea was that this young stranger from Canada might possibly be done to death in London without coming down to Devonshire at all. He distrusted his wife ever since she had refused to help him in laying a trap for the