Still from the American film "The Four Horsemen of the Apocalypse" (1921) showing two background characters involving unidentified actors in the film as seen from a window in the French village when the men were readying to go to war, on page 188 of Peter Milne, "Motion Picture Directing; The Facts and Theories of the Newest Art" (1922). The caption in the book notes that director Rex Ingram was able to suggest a situation in this short scene (which was only a few seconds long) between the characters.