Book excerpt: Through the works of the major fifteenth-century draughtsmen - Pisanello, Jacopo Bellini, Pollaiuolo, Ghirlandaio, Carpaccio and Leonardo da Vinci - Francis Ames-Lewis then explores new types of drawing evolved during the century: the free sketch contrasting with the frozen control of the model-book, the exploratory study of the nude, the preparatory compositional sketch and the cartoon.