There were no ghosts in "The Ghost Ship." The actor who handled the acton scenes in "The Masked Marvel" serial went uncredited! None of the stars of "Double Indemnity" originally wanted to be in the film!
There's rumor of an ancient story of the privateer Dash, which was lost in a gale in 1815 off the coast of Maine. Since her disappearance, she has been sighted multiple times -- plain as day with her name visible on the hull.