The Traitor's Gate

The Traitor's Gate is a 1927 crime novel by the British writer Edgar Wallace. It concerns a plot by a criminal mastermind to steal the Crown Jewels from the Tower of London.

Adaptations
It has been adapted into film twice:
 * The Yellow Mask, a 1930 British film directed by Harry Lachman
 * Traitor's Gate, a 1964 British-German film directed by Freddie Francis