Charlie Chaplin filmmaking methods, claiming such a thing would be tantamount to a magician spoiling his own illusion. Little was known about his working process throughout his lifetime, but research from film historians – particularly the findings of Kevin Brownlow and David Gill that were presented in the three-part documentary "Unknown Chaplin" (1983) – has since revealed his unique working method. Until he began making spoken dialogue films with "The Great Dictator", Chaplin never shot from a completed script. Many of his early films began with only a vague premise – for example "Charlie enters a health spa" or "Charlie works in
Charlie Chaplin over the making of his pictures. "A Dog's Life", released April 1918, was the first film under the new contract. In it, Chaplin demonstrated his increasing concern with story construction and his treatment of the Tramp as "a sort of Pierrot". The film was described by Louis Delluc as "cinema's first total work of art". Chaplin then embarked on the Third Liberty Bond campaign, touring the United States for one month to raise money for the Allies of the First World War. He also produced a short propaganda film at his own expense, donated to the government for fund-raising, called