The Valley of Fear

The Valley of Fear was a novel by Arthur Conan Doyle. It was the last novel to feature Sherlock Holmes and John H. Watson. In the novel, Holmes used a copy of Whitaker's Almanack to solve a secret code. 
In 2365, Data showed Geordi La Forge the almanac as one example of the items Holmes collected, citing which Holmes novel it came from. ()
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de:Das Tal der Angst
fr:La vallée de la peur
Valley of Fear, The