“My inquiries show beyond all question that the family portrait did not lie, and that this fellow was indeed a Baskerville. He was a son of that Rodger Baskerville, the younger brother of Sir Charles, who fled with a sinister reputation to South America, where he was said to have died unmarried. He did, as a matter of fact, marry, and had one child, this fellow, whose real name is the same as his father’s. He married Beryl Garcia, one of the beauties of Costa Rica, and, having purloined a considerable sum of public money, he changed his name to Vandeleur and fled to England, where he established a school in the east of Yorkshire. His reason for attempting this special line of business was that he had struck up an acquaintance with a consumptive tutor upon the voyage home, and that he had used this man’s ability to make the undertaking a success. Fraser, the tutor, died, however, and the school which had begun well sank from disrepute into infamy. The Vandeleurs found it convenient to change their name to Stapleton, and he brought the remains of his fortune, his schemes for the future, and his taste for entomology to the south of England. I learn at the British Museum that he was a recognized authority upon the subject, and that the name of Vandeleur has been permanently attached to a certain moth which he had, in his Yorkshire days, been the first to describe.

“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.

“Having conceived the idea he proceeded to carry it out with considerable finesse. An ordinary schemer would have been content to work with a savage hound. The use of artificial means to make the creature diabolical was a flash of genius upon his part. The dog he bought in London from Ross and Mangles, the dealers in Fulham Road. It was the strongest and most savage in their possession. He brought it down by the North Devon line and walked a great distance over the moor so as to get it home without exciting any remarks. He had already on his insect hunts learned to penetrate the Grimpen Mire, and so had found a safe hiding-place for the creature. Here he kennelled it and waited his chance.