Yahoo Web Search

While London Sleeps is a 1926 synchronized sound Warner Bros. film about a police-dog, Rinty, who helps Scotland Yard defeat a dangerous criminal organisation known as the Mediterranean Brotherhood that operates out of the Limehouse district of London. While the film has no audible dialog, it was released with a synchronized musical score with sound effects using both the Vitaphone sound-on-disc process. Walter Morosco wrote the screenplay. imdb.com