The Engineer's Thumb (Part 04) || The Adventures of Sherlock Holmes by Arthur Conan Doyle

In "The Engineer's Thumb," Sherlock Holmes investigates a case involving a hydraulic engineer named Victor Hatherley, who seeks Holmes' help after losing his thumb in strange circumstances. Holmes uncovers a dangerous plot involving counterfeit money and a criminal organization. The story showcases Holmes' analytical prowess in solving intricate mysteries.