The Hound of the Baskervilles by Sir Arthur Conan Doyle
Holmes and Watson receive a visit from Dr. James Mortimer, who wishes to consult them before meeting Sir Henry Baskerville, the last of the Baskervilles, and heir to the Baskerville estate in Dartmoor. Dr. Mortimer tells them he is uneasy about letting Sir Henry go to Baskerville Hall, owing to a supposed family curse. He narrates the legend of the Hound of the Baskervilles, a demonic dog that first killed Sir Hugo Baskerville several hundred years ago, and is believed to kill all Baskervilles in the region of Dartmoor. When Holmes dismisses it as a fairy tale, Mortimer narrates the events of the recent death of Sir Charles Baskerville, Henry's uncle. Although he was found dead in his garden without any trace of physical damage, his face was distorted as if he died in utter terror. Dr. Mortimer then reveals something that he had not mentioned at the official inquest. He alone had noticed footmarks at some distance from the body when it was found; the footmarks of a gigantic hound.