A Gentleman of Quality (1919)

After quarreling with his stepfather, John Ashton runs away to London. At the same time, Lord John Hertford marries Lady Mercy Covington, but he disappears on the wedding night. Ashton is injured in a traffic accident in London, and is believed to be Hertford, even by Lady Mercy. Ashton's memory is jarred and he marries Lady Mercy in another ceremony. Meanwhile, her cousin locates Lord John in India and leaves him in a doctor's care after receiving a cable from Lady Mercy that her husband has been found. The cousin is shipwrecked for seven years, during which time it is discovered that Ashton and Lord John are twin brothers, separated and abducted because of Sicilian vengeance. While reading mail accumulated over seven years, the cousin discovers that Lord John died soon after leaving for England.