“I am presuming that the cause of his fears came to him across the moor. If that were so, and it seems most probable, only a man who had lost his wits would have run from the house instead of towards it. If the gipsy’s evidence may be taken as true, he ran with cries for help in the direction where help was least likely to be. Then, again, whom was he waiting for that night, and why was he waiting for him in the yew alley rather than in his own house?”

“You think that he was waiting for someone?”

“The man was elderly and infirm. We can understand his taking an evening stroll, but the ground was damp and the night inclement. Is it natural that he should stand for five or ten minutes, as Dr. Mortimer, with more practical sense than I should have given him credit for, deduced from the cigar ash?”

“But he went out every evening.”

“I think it unlikely that he waited at the moor-gate every evening. On the contrary, the evidence is that he avoided the moor. That night he waited there. It was the night before he made his departure for London. The thing takes shape, Watson. It becomes coherent. Might I ask you to hand me my violin, and we will postpone all further thought upon this business until we have had the advantage of meeting Dr. Mortimer and Sir Henry Baskerville in the morning.”