The Secret Of St. Ives.

A French soldier in the Napoleonic Wars plots his escape after he's captured and imprisoned in a castle fortress in Edinburgh, Scotland. Director Philip Rosen's 1949 film, adapted from a novel by Robert Louis Stevenson, stars Richard Ney, Vanessa Brown, Henry Daniell, John Dehner, Douglas Walton, Aubrey Mather, Jean Del Val, Luis Van Rooten, Maurice Marsac and Billy Bevan.