"Twenty-four hours. At ten o'clock tomorrow, Dr. Mortimer, I
will be much obliged to you if you will call upon me here, and
it will be of help to me in my plans for the future if you will
bring Sir Henry Baskerville with you."

"I will do so, Mr. Holmes." He scribbled the appointment on his
shirt-cuff and hurried off in his strange, peering, absent-minded
fashion. 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