The vast increase in film production after 1906 inevitably brought specialist writers into film-making as part of the increasing sub-division of labour, but even so the film companies still had to buy stories from outsiders to get enough material for their productions. This introduced a greater variety into the types of story used in films. The use of more complex stories derived from literary and stage works of the recent past also contributed to developments in script film construction. The general American tendency was to simplify the plots borrowed from novels and plays so that they could be dealt with in one reel and with the minimum of titling and the maximum of straightforward narrative continuity, but there were exceptions to this. In these cases the information that was difficult to film and lacking in strong dramatic interest was put into narrative titles before each scene, and this was also mostly the custom in European films of the more seriously intended kind. Motion pictures were classified into genres by the film industry following the divisions already established in other media, particularly the stage. The main division was into comedy and drama, but these categories were further subdivided. Comedy could be either slapstick (usually referred to as “burlesque farce”), or alternatively “polite comedy”, which later came to be referred to as “domestic comedy” or “sophisticated comedy”. D.W. Griffith made a small number of the latter type of film in his first two years at Biograph, but had little interest or aptitude for the genre. From 1910 he let Frank Powell, and then Mack Sennett direct the Biograph comedies. Sennett left in 1912 to set up the Keystone company, where he could give his enthusiasm for the slapstick comedy style derived from the earlier Pathé comedies like le Cheval emballé (The Runaway Horse) full rein. In Europe the more restrained type of comedy was developed in substantial quantities in France, with the films of Max Linder for Pathé representing the summit of the genre from 1910 onwards. Linder's comedy was set in an upper middle-class milieu, and relied on clever and inventive ways of getting around the embarrassments and obstacles arising in his single-minded pursuit of a goal. Quite often a goal of a sexual nature.
D.W. Griffith had a major influence on the simplification of film stories. After he had been at Biograph for a year, Griffith started to make some films that had much less story content than any previous one-reel films. In The Country Doctor, the action is no more than various people, including the doctor, hurrying backwards and forwards between the doctor's house, where his child is sick, and a neighbouring cottage, where another child is also sick. By 1912 and 1913, there are beginning to be many films from many American companies that rely on applying novel decoration to the story, rather than supplying any twists to the drama itself to sustain interest.
