III

Holmes stopped him at the head of the stair.

“Only one more question, Dr. Mortimer. You say that before Sir Charles Baskerville’s death several people saw this apparition upon the moor?”

“Three people did.”

“Did any see it after?”

“I have not heard of any.”

“Thank you. Good morning.”

Holmes returned to his seat with that quiet look of inward satisfaction which meant that he had a congenial task before him.

“Going out, Watson?”

“Unless I can help you.”

“No, my dear fellow, it is at the hour of action that I turn to you for aid. But this is splendid, really unique from some points of view. When you pass Bradley’s, would you ask him to send up a pound of the strongest shag tobacco? Thank you. It would be as well if you could make it convenient not to return before evening. Then I should be very glad to compare impressions as to this most interesting problem which has been submitted to us this morning.”

I knew that seclusion and solitude were very necessary for my friend in those hours of intense mental concentration during which he weighed every particle of evidence, constructed alternative theories, balanced one against the other, and made up his mind as to which points were essential and which immaterial. I therefore spent the day at my club and did not return to Baker Street until evening. It was nearly nine o’clock when I found myself in the sitting-room once more.