Ernest Maupain (1869–1944) was a French film actor who appeared in many American films during the silent era. He played the role of Professor Moriarty in the 1916 Essanay Studios film Sherlock Holmes.^[1]

• The Raven (1915)
• Captain Jinks of the Horse Marines (1916)
• Sherlock Holmes (1916)
• That Sort (1916)
• The Prince of Graustark (1916)
• Max Wants a Divorce (1917)
• The Trufflers (1917)
• The Turn of the Wheel (1918)
• Lafayette, We Come (1918)
• Face à l'Océan (1920)
• La folie du doute (1920)
• The Two Pigeons (1922)
• The Mysteries of Paris (1922)
• The Bread Peddler (1923)
• Le Miracle des loups (1924)
• The Chocolate Girl (1927)

• Amnon Kabatchnik. Sherlock Holmes on the Stage: A Chronological Encyclopedia of Plays Featuring the Great Detective. Scarecrow Press, 2008.

• Ernest Maupain at IMDb