The Broken Violin (1923)

When aged Jeremy Ellsworth decides to settle his fortune on John and Beatrice, the children of his disinherited son, he sends for them to come live with him. Beatrice arrives safely, but James Gault, Ellsworth's secretary, intercepts the letter to John and engages Phil Carter to pose as the heir. John, a lumber camp foreman, hears of the plot, hastens to the Ellsworth home, and is overpowered by ruffians, who also kidnap Beatrice. Escaping his captors, John rescues his sister from a speedboat with the aid of a hydroplane and finds love with Beatrice's governess.