Leonardo da Vinci (1452–1519). Cartoon for the head of the infant Saint John the Baptist, about 1482–3. Metalpoint with traces of pen and ink and wash heightened with white on prepared paper, pricked for transfer, 13.4 x 11.9 cm (irregularly cut) mounted on paper, 16.9 x 14 cm. Musée du Louvre, Paris, Département des Arts Graphiques (2347). © RMN / Michèle Bellot.