Chapter 6 of Arthur Conan Doyle’s “The Hound of the Baskervilles” begins with Watson waking from a heavy slumber to discover that Holmes has already gone for Dartmoor to investigate the Baskerville case. He receives a telegram from Holmes requesting that he join him as soon as possible. Watson is perplexed as to why Holmes is seeking his presence since he believes Holmes is fully capable of handling the matter on his own.

When Watson arrives at the Dartmoor station, he encounters Sir Henry, who appears worried and unsettled. Sir Henry informs Watson that he has received a letter from a guy named Barrymore, the butler at Baskerville Hall. The letter advises Sir Henry to keep away from the moor because he believes there is a severe threat hiding there. Sir Henry also admits that he has been followed by a bearded man who has been spotted lurking around his hotel.

Watson and Sir Henry drive a carriage to the Baskerville estate, where they meet Barrymore and his wife. They ask the pair about the letter, but Barrymore denies she wrote it. Mrs. Barrymore admits that her husband has a brother who lives on the moor, but she believes he is a kind man who would not hurt Sir Henry.

Watson and Sir Henry next go to the Grimpen Mire, a dangerous swamp on the moor, where they encounter the local postman, who tells them that he has seen a mystery figure prowling around the moor at night. The postman reportedly claims having spotted the footprints of a huge hound near the Baskerville mansion.

Following their excursion to the mire, Watson and Sir Henry return to the estate and meet Dr. Mortimer, who has brought with him the old manuscript that he had shown Holmes earlier. Dr. Mortimer discloses that the document is a family tradition concerning a curse imposed on the Baskervilles many years ago. The folklore talks of a terrible hound who is claimed to torment the family and cause their demise.

Watson and Sir Henry then attend a dinner party at the estate, where they meet numerous of the residents, including a man named Stapleton who lives close by. During the party, Sir Henry receives another warning message, this one from an unidentified source.

Later that night, Watson notices weird sounds coming from outside his window. He glances outside and notices a man strolling across the moor holding a flashlight. The man is eventually identified as Sir Henry, who went out to meet a woman named Laura Lyons, who had requested to talk with him. Watson pursues Sir Henry and encounters Laura Lyons, who says that she wrote the letter telling Sir Henry to keep away from the moors. She admits that she was persuaded by a man named Stapleton, who threatened to harm her if she didn’t participate.

In Chapter 6, the mystery surrounding the Baskerville case deepens as Watson and Sir Henry come across various dubious persons and unusual occurrences on the moor. The hound’s presence is further hinted to by the discovery of footprints. The chapter concludes with the news that Stapleton may be involved in the danger that Sir Henry faces.