Robert Louis Stevenson's St. Ives

"During the Napoleonic wars in France, the Count of St. Ives, a French nobleman, captured in battle and brought to a POW camp in Scotland. Once there, adventure and daring await when he meets and falls in love with a local woman, befriends the camp's British Major, and discovers his long-lost grandfather living just down the road."@en
"During the Napoleonic wars in France, the Count of St. Ives, a French nobleman, is taken prisoner by the British and taken to a prison in Scotland. Thinking that his entire family was murdered during the uprising, St. Ives finds that his brother and grandfather are still alive. His grandfather finds out St. Ives is alive. St. Ives escapes from prison and his grandfather proclaims his entire estate and fortune to St. Ives. But St. Ives's brother has other ideas. In the meantime St. Ives falls in love."@en
"A French prisoner of war being held in a camp in the Scottish Highlands strikes up a friendship with the major who runs the camp and falls in love with a local girl."