The Sign of the Four

by Arthur Conan Doyle

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"The Sign of the Four" by Arthur Conan Doyle is a detective novel published in 1890. When Mary Morstan seeks Sherlock Holmes's help regarding her missing father and mysterious annual gifts of pearls, the investigation leads to a buried treasure, a vengeful one-legged man, and murder.

Summary from Project Gutenberg.

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Topics: Detective and mystery stories · Holmes, Sherlock (Fictitious character) -- Fiction · Private investigators -- England -- Fiction