The Hound of the Baskervilles was originally published serially in The Strand Magazine in 1901–1902. In the third of four Holmes novels, Sir Charles Baskerville is found dead on the grounds of his country house, Baskerville Hall. The cause is initially ascribed to a heart attack. But fearing for the safety of Sir Henry Baskerville, who is Sir Charles’s nephew and only known heir, Dr. James Mortimer travels to London and asks Holmes for help in figuring out the case. Holmes and Watson investigate the case and must fight against a seemingly supernatural hound that has been haunting the Baskerville family for generations.