Dr. Mortimer and Sherlock Holmes go in the hotel, where Sir Henry is staying. There, they find again the shoe of Sir Henry. The men send a telegram to Baskerville Hall, to be sure, that Barrymore ( the butler) is there and not in London, because they have seen a manin the carringe in the morning, who followed Sir Henry ( look chapter 4). The postmaster says them, that Mr. Barymore became the message.
Sir Henry comes with Dr. Mortimer to Sherlock Holmes. Sherlock and Dr. Mortimer tell the new owner of Baskerville Hall, Sir Henry about their fears and apprehensions of this house. Sir Henry has also to tell somthing. Namely, that an unknown person followed him. He became also a "threatening letter", inside stood:"As you vollue your life or your reason keep away from the moor." All words were clipped out of a Newsletter, except the word "moor". Sir Henry shoe disappearances. And on way to the hotel Northumberland, in wich Sir Henry present is living, they get to fallow of an unknown prson in a carriage and with a black mustache.
Sherlock accepts the order because Mr. Mortimer has many of good evidences, for example, that he found next to the cadaver som e traces of a big paw. On the next day, Mr. Mortimer comes with the next inhabitant of Baskerville Hall.
Dr. Mortimer tells Sherlock and Mr. Watson about the history of the curse of the Baskervilles.