The Adventure of the Seven Clocks

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The Adventure of the Seven Clocks is a Sherlock Holmes story by Adrian Conan Doyle and John Dickson Carr. The story was published in the 1954 collection, The Exploits of Sherlock Holmes.

Holmes is consulted by a young lady, a companion to an older woman, about the eccentric behavior of a young man she has met. He behaves normally, but becomes a raging maniac whenever he encounters a clock. The young woman personally has seen him smash two clocks and heard from the man's servant of five other incidents. Holmes must travel to a distant seaport to gather information to resolve a horrible, terrorist scheme and solve the mystery of the aberrant behavior.