Riddle Gawne is a 1918 American silent Western film directed by William S. Hart and Lambert Hillyer, and featuring William S. Hart, Katherine MacDonald and Lon Chaney. The film was co-produced by William S. Hart and Thomas H. Ince. The screenplay was written by Charles Alden Seltzer from his earlier novel The Vengeance of Jefferson Gawne. Chaney historian Jon C. Mirsalis claims that William S. Hart contributed greatly to the screenplay but all other sources credit the writing of the screenplay solely to Charles Alden Seltzer.Considered lost for decades, two of the five reels were found to have survived in a Russian archive and are now kept in the film archive of the Library of Congress. It is unknown if Lon Chaney appears in those two reels. A still exists showing Lon Chaney (as Hame Bossam) preparing to shoot the unconscious Riddle Gawne (William S. Hart) in the head. A 1918 advertisement for the showing of the film at Sid Grauman's "Million Dollar Theater" in downtown Los Angeles exists, as well as a great publicity photo showing the film's major players in a group shot.