Our friends had already secured a first-class carriage and were waiting for us upon the platform.

"No, we have no news of any kind," said Dr. Mortimer in answer to my friend's questions. "I can swear to one thing, and that is that we have not been shadowed during the last two days. We have never gone out without keeping a sharp watch, and no one could have escaped our notice."

"You have always kept together, I presume?"

"Except yesterday afternoon. I usually give up one day to pure amusement when I come to town, so I spent it at the Museum of the College of Surgeons."

"And I went to look at the folk in the park," said Baskerville. "But we had no trouble of any kind."

"It was imprudent, all the same," said Holmes, shaking his head and looking very grave. "I beg, Sir Henry, that you will not go about alone. Some great misfortune will befall you if you do. Did you get your other boot?"

"No, sir, it is gone forever."

"Indeed. That is very interesting. Well, good-bye," he added as the train began to glide down the platform. "Bear in mind, Sir Henry, one of the phrases in that queer old legend which Dr. Mortimer has read to us, and avoid the moor in those hours of darkness when the powers of evil are exalted."