The Paternoster Ruby

A narrator becomes involved in enquiring into a financier's sudden death and discovers connections to a famed ruby whose turbulent provenance and history of thefts cast suspicion on several figures. Collaborating with a wary circle of allies and a reliable assistant, the investigator traces clues through urban rooms and streets: a hidden safe, a puzzling cipher, footprints in snow, a secret second-story entry, and a face revealed in an alcove. The inquiry moves through betrayals, prison, a violent nocturnal confrontation, and a woman's risky mission, ending in confessions and the deciphering that exposes how the jewel factored into the crime, with themes of greed and secrecy driving the plot.