The Adventure of the Engineer's Thumb: A Sherlock Holmes Short Story

One of the stories collected in "The Adventures of Sherlock Holmes. " It's full of danger with a lesson for us all.

A young London engineer, contracted to service a hydraulic press at a country house, discovers that the owner is using the machine for illegal purposes. After confronting the owner, the engineer narrowly escapes death and loses a thumb when the owner turns on him. The young man, Victor Hatherley, escapes and comes to see Holmes who, upon hearing the story, deduces the actual use of the machine and sets off to bring the evildoers to justice. The main question is, "What's is actually going on at Eyford in Berkshire? The series includes four novels and 58 short stories. "