The Adventure of the Engineer's Thumb

The young engineer Victor Hatherley has been recruited by Colonel Lysander Stark to examine a hydraulic press, for the enormous amount of 50 guineas. He accepted immediately but the situation quickly sours. When he comes to tell Sherlock Holmes his story, he's missing a thumb. "e;The Adventure of the Engineers Thumb"e; is part of "e;The Adventures of Sherlock Holmes"e;.