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 Marriage Circle" (1924) and thus played a part in the development of "sophisticated comedy". According to David Robinson, Chaplin's innovations were "rapidly assimilated to become part of the common practice of film craft." Filmmakers who cited Chaplin as an influence include Federico Fellini (who called Chaplin "a sort of Adam, from whom we are all descended"), Jacques Tati ("Without him I would never have made a film"), René Clair ("He inspired practically every filmmaker"), Michael Powell, Billy Wilder, Vittorio De Sica, and Richard Attenborough. Russian filmmaker Andrei Tarkovsky praised Chaplin as "the only person to have gone down into cinematic