In 'The Hound of the Baskervilles', what is the name of the London hotel where Holmes and Watson meet?

In “The Hound of the Baskervilles,” Holmes and Watson meet Sir Henry Baskerville and Dr James Mortimer at the Northumberland Hotel in London. The hotel is where Sir Henry is staying after arriving in England to claim his family estate and confront the ominous legend surrounding the Baskervilles.

The meeting follows an early chain of clues. Sir Henry has received a threatening anonymous message, and one of his new boots disappears. Holmes and Watson follow him and Mortimer after seeing them leave a picture gallery, then arrange to meet them for lunch at the hotel. Holmes uses the encounter to question Sir Henry and to assess whether someone is secretly following him.

The Northumberland Hotel also becomes important because the villains appear to know Sir Henry’s address almost immediately. Holmes treats that knowledge as evidence that Baskerville is being watched. Readers sometimes substitute famous London hotels such as the Ritz, Savoy or Langham, but those names do not belong to Doyle’s narrative. The novel was first serialized in 1901–1902 and published in book form in 1902.