When a couple of scammers hold young Alice Faulkner against her will to discover the whereabouts of letters whose dissemination could cause a scandal affecting the royal family, Sherlock Holmes decides to take over the case. (Considered lost, a copy was found in 2014, in the vaults of the Cinémathèque Française.)

• The Essanay Film Manufacturing Company
• William Gillette
• Ernest Maupain
• Marjorie Kay
• Edward Fielding
• Stewart Robbins
• Hugh Thompson
• Ludwig Kreiss
• Mario Majeroni