Sherlock Holmes and the Engineers Thumb

One morning Dr. Watson gets an unexpected visitor from a far away city named Victor Hatherley who is a hydraulic engineer. He tells Watson that his thumb is cut off and he wants to figure out who cut his thumb off. Then Dr. Watson takes Victor Hatherley to Sherlock Holmes a famous detective from Scotland yards. Hatherley tells Holmes that he was confronted by Colonel Lysander who told him to examine a machine. Lysander would give him 50 guineas to examine the strange machine. While Hatherley is inside the house a woman approaches him and tells him to leave the house immediately because it is not safe here. Hatherley finds out that one piece of the machine is not used for its purpose which is to dig up land. When he tries to turn on the machine it almost kills him but he manages to jumps out of a window. When he lands back down he discovers his thumb has been cut off by something. When Sherlock Holmes, Dr. Watson and Victor Hatherley arrive at the house where the crime took place it is on fire. Holmes figures that the lamp Hatherley used was crushed inside the machine and the machine caught on fire and then the house. Colonel Lysander and the strange woman were trying to make counterfeit money and their operation was dampened by the fire, unfortunately the perpetrators escaped.