Percy Learns to Waltz is a 1912 American silent comedy film starring John R. Cumpson. It was produced by the Independent Moving Pictures (IMP) Company of New York.
As described in a film magazine, Eileen Rodney (Dalton) is in love with Raymoond Moreland (Connklin), a lecturer who favors the mating of souls without the usual ceremony. When she learns his true convictions she is disgusted and accepts the proposal of her guardian, John Harland (Hall). After she is married, Eileen meets Moreland and requests the return of her love letters, and he invites her to his home. When she gets there he forces his attentions on her. In self defense she strikes him and, believing him dead, rushes from the home. The guilt of her action weighs on her life. Later, a half crazed gardener confesses to the crime and, with the knowledge that she is blameless, Eileen confesses everything to her husband.
The story is about a young woman who is a quarter Native American Indian, Mary Thorne (Glaum), who returns to the home of her prospector father, Marshall Thorne (Dowling), after completing her education in the East. She has a college degree and an air of refinement.