Tracked by a Tattoo: A Mystery

"Tracked by a Tattoo: A Mystery" by Fergus Hume is a late 19th-century detective story where Mr. Fanks, a Scotland Yard detective living a double life, investigates the poisoning of Sir Gregory Fellenger in a criminal part of London. Arriving at the crime scene, Fanks meets a suspicious landlady and a nervous doctor, finding that the victim had a tattoo and was tied to coded messages suggesting a larger conspiracy. The story introduces a mysterious woman from the victim's past, whose involvement is unclear but significant, pushing Fanks into a tangled investigation filled with lies, hidden identities, and secrets lurking beneath the surface of society.