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A collection of facsimiles of Dr. Watson's private papers, including notes, telegrams, maps, photographs, newspaper clippings, and other clues to assist the reader in solving the mystery of the Sign of four.

A Study in Scarlet is an 1887 detective novel by Scottish author Arthur Conan Doyle. Written in 1886, the story marks the first appearance of Sherlock Holmes and Dr. Watson, who would become the most famous detective duo in popular fiction. The book's title derives from a speech given by Holmes, a consulting detective, to his friend and chronicler Watson on the nature of his work, in which he describes the story's murder investigation as his "study in scarlet" "There's the scarlet thread of murder running through the colourless skein of life, and our duty is to unravel it, and isolate it, and expose every inch of it."

John Ferrier and his daughter are in danger when they are saved by a group of Mormons.

A Study in Scarlet brings Sherlock Holmes and Dr. John Watson together for the first time, creating one of the most illustrious crime-solving partnerships of all times. In The Sign of Four, an incredible tale of greed and revenge unfolds as Holmes and Watson accompany a beautiful young woman to the dark heart of London.

Two bizarre tales: the first marks the beginning of the illustrious Holmes and Watson crime-solving partnership; the second leads the investigative pair on a terrifying mission to the dark heart of London.