The Clue of the New Pin (1929 film)

The Clue of the New Pin is a 1929 British silent mystery film directed by Arthur Maude, and starring Donald Calthrop, Benita Hume, and John Gielgud. It is based on the 1923 novel The Clue of the New Pin by Edgar Wallace. The film is notable for being one of the early film adaptations of Wallace's work.

The plot revolves around the investigation into the murder of an investment swindler named Mr. Holland. The primary suspect is his partner, Mr. Trasmere, but as the detectives delve deeper, the circumstances become increasingly complicated. Key to solving the mystery is the "new pin" referenced in the title, a small but vital piece of evidence connected to a secret room and a complex scheme involving stolen funds and concealed identities. Inspector Briscoe, a Scotland Yard detective, leads the investigation, encountering various suspects and red herrings along the way. John Gielgud's character is a relatively minor role within the overall narrative.