Son of Fury: The Story of Benjamin Blake (1942)

Sir Arthur Blake has inherited title and lands from his brother. He also has his orphaned nephew Benjamin working for him as a bonded servant. While he believes the lad was born out of wedlock so cannot claim the inheritance, he is taking no chances. Benjamin eventually rebels against his uncle and sets sail to try to make his fortune. This could enable him to return to prove his claim to being the rightful heir to the estate.