1. Crime: Theft of the Crown Jewels using a primitive airship Method: The criminal uses a hot air balloon to silently float above the Tower of London, lowering a rope down to accomplices inside the tower. False Evidence: Guards are bribed to provide false witness statements. Solution: The detective discovers trace amounts of hydrogen on a piece of discarded rope nearby, linking the theft to the use of an airship. 2. Crime: The poisoning of a renowned scientist with arsenic-laced tea leaves. Method: The criminal delivers a rare collection of tea leaves to the victim, which contain the poison. False Evidence: Anonymous letter accuses a jealous colleague. Solution: The detective researches the tea's origin and connects the seller to the criminal. 3. Crime: Electrocution of an inventor via an early version of the electric chair. Method: Criminal invites the inventor for a demonstration of his latest invention and sabotages the equipment. False Evidence: A rival inventor is framed as the prime suspect. Solution: The detective finds a misplaced wire in the chair and links it to the criminal's style of work. 4. Crime: Assassination of a noble using a modified steam-powered rifle. Method: The criminal sets up the rifle and disguises it as a steam pipe, ensuring no witnesses. False Evidence: The rifle is rigged to self-destruct, ensuring no physical evidence. Solution: Analyzing the angle of the shot, the detective narrows the location possibilities, discovering an eyewitness who saw the criminal. 5. Crime: Kidnapping of a wealthy heiress using a trained falcon to intercept her letters. Method: The criminal replaces her responses with forgeries to manipulate her location. False Evidence: Blaming it on the family's rival. Solution: Comparing handwriting from the letters, the detective deduces the forgeries and tracks down the kidnapper. 6. Crime: Poisoning of a group of politicians with tainted cigars. Method: The criminal sends a case of 'exclusive' cigars as a gift to the politicians, laced with poison. False Evidence: The cigar manufacturer is initially implicated. Solution: The detective unravels the intricate paper trail leading to the buyer of the poison and finds connections to the criminal. 7. Crime: Theft of a secret government document through a series of underground tunnels. Method: The criminal uses a burrowing machine to navigate to the vaults. False Evidence: Underground explosions are attributed to natural gas leaks. Solution: The detective finds traces of tunnel shavings matching the stolen documents' location and connects it to the criminal. 8. Crime: Sabotaging a bridge's grand opening with an explosion, ruining the reputation of the designer. Method: Dynamite disguised as a structural component is rigged to explode. False Evidence: Framing a rival engineer for the sabotage. Solution: The detective analyzes the blueprints, discovers the hidden dynamite, and connects it to the criminal. 9. Crime: Bank robbery orchestrated by a tailor who sewed detailed maps of secure locations inside clients' suits. Method: Using the map, the thieves navigate the bank undetected. False Evidence: An employee is framed for the crime. Solution: Examining a torn suit at the scene, the detective deciphers the coded map and traces it to the tailor. 10. Crime: Stealing a priceless artifact from a museum using a swarm of trained rats to do the thief's bidding. Method: Criminal hides in plain sight with a rat training act in a nearby circus. False Evidence: A mysterious foreign diplomat is blamed. Solution: The detective notices that a few missed artifacts were also rat-accessible, then locates the circus and interrogates the rat trainer.