 François Truffaut (qv)s English was not strong. In order to get  through some of his scenes, he stuck pieces of paper with his lines  on them on various objects where he could read from them but the  camera would not pick them up. In one case, as he arguing stands  face to face with an Army officer (who has his back to the camera),  he is in fact reading his lines off a card pinned to the mans  chest. (He had shown the same trick being used with an actress who  was having trouble with her lines in his own  _Nuit américaine, La (1973)_ (qv) (Day for Night), in which he  played the director of the movie