Crime Mystery
A convicted thief in Dartmoor prison hides the location of the stolen Bank of England printing plates inside three music boxes. When the innocent purchasers of the boxes start to be murdered, Holmes and Watson investigate.
Directed by
Roy William Neill
Lillian Bronson
Minister's Wife (uncredited)
Frank Mills
Pub Patron (uncredited)
Basil Rathbone
Sherlock Holmes
Frederick Worlock
Colonel Cavanaugh
Nigel Bruce
Dr. John H. Watson
Marjorie Bennett
Antique Shop Assistant (uncredited)
Jack Curtis
Pub Patron (uncredited)
Mary Gordon
Mrs. Hudson
Charlie Hall
Cab Driver (uncredited)
Olaf Hytten
Alfred - Auction House Bookkeeper (uncredited)
Harry Cording
Hamid
Ian Wolfe
Commissioner of Scotland Yard
Holmes Herbert
Ebenezer Crabtree
Patricia Morison
Mrs. Hilda Courtney
Cyril Delevanti
Convict at Dartmoor Prison (uncredited)
Edmund Breon
Julian 'Stinky' Emery
Leyland Hodgson
Tour Guide
William H. O'Brien
Detective at Murder Scene
Carl Harbord
Inspector Hopkins
Sally Shepherd
Patricia Cameron
Evelyn Clifford
Frank Baker
Photographer
Wallace Scott
Joe Cisto
Bobby Hale
Pub Patron (uncredited)
Alexander Pollard
Crabtree's Assistant at Auction (uncredited)

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