The Boscomb Valley Mystery (Return of Sherlock Holmes

by Arthur Conan Doyle

Contains: [Adventure of the Beryl Coronet](https://openlibrary.org/works/OL14929825W/Adventure_of_the_Beryl_Coronet) [Adventure of the Engineer's Thumb](https://openlibrary.org/works/OL1518318W/Adv…