“We now come to that portion of his life which has proved to be of such intense interest to us. The fellow had evidently made inquiry and found that only two lives intervened between him and a valuable estate. When he went to Devonshire his plans were, I believe, exceedingly hazy, but that he meant mischief from the first is evident from the way in which he took his wife with him in the character of his sister. The idea of using her as a decoy was clearly already in his mind, though he may not have been certain how the details of his plot were to be arranged. He meant in the end to have the estate, and he was ready to use any tool or run any risk for that end. His first act was to establish himself as near to his ancestral home as he could, and his second was to cultivate a friendship with Sir Charles Baskerville and with the neighbours.
“The baronet himself told him about the family hound, and so prepared the way for his own death. Stapleton, as I will continue to call him, knew that the old man’s heart was weak and that a shock would kill him. So much he had learned from Dr. Mortimer. He had heard also that Sir Charles was superstitious and had taken this grim legend very seriously. His ingenious mind instantly suggested a way by which the baronet could be done to death, and yet it would be hardly possible to bring home the guilt to the real murderer.