The Ghost of Slumber Mountain (1918)
The Ghost of Slumber Mountain was a 1918 film, written and directed by special effects pioneer Willis O'Brien, produced by Herbert M. Dawley, and starred both men; Dawley played Uncle Jack Holmes, while O'Brien played the ghost of Mad Dick the Hermit. Although most of the film itself is lost, it is often cited as a trial run for The Lost World.
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