The Impostor(1913)

Jim Owens, a sergeant in the Union army, finds the body of a dead Confederate, whose resemblance to himself is so great that he is startled. He makes an examination of the man's clothes and finds a letter addressed to John Calhoun, 7th Regiment, Virginia Volunteers. The letter is from the man's mother, telling him that her world is very narrow now that she has lost her eyesight. Never having known a mother's love, Owens decides to impersonate Calhoun, feeling that the mother will not recognize that he is not her son, now that she is blind.