"The facts of the case are simple. Sir Charles Baskerville was in the habit every night before going to bed of walking down the famous alley of Baskerville Hall." [The Hound of Baskerville, pg. 510]
On the fourth of May Stir Charles had declared his intention of starting for London, That night he went for his nocturnal walk. He never returned. At twelve o'clock Barrymore, finding the hall door still open, became alarmed, and lighting a lantern, went in search of his master. The day had been wet, and Sir Charles's footmarks were easily traced down the alley. [The Hound of Baskerville, pg. 510]
Dr. Mortimer pictured to the left. Sherlock pictured to the right. Watson pictured in the middle.
He then proceeded down the alley, and it was at the far end of it that his body was discovered. [The Hound of Baskerville, pg. 510]