The Sea Beast (1926)
The Sea Beast is a 1926 silent film adaptation of the novel Moby Dick by Herman Melville, a story about a monomaniacal hunt for a great white whale. However, the film alters the novel's plotline by establishing prequel (the romancing of Esther) and sequel (Ahab's safe return) elements that are not in the original story, and substitutes a happy ending for Melville's original tragic one.
More at Wikipedia.