Leonardo da vinci, Institut de France, Manoscritto B, c. 95r, Leonardo da Vinci, 1488–90

A page from paris manuscript b. Pen and ink on paper, 23 x 16 cm, located in the bibliothèque de l’institut de france (details from http://www. Universalleonardo. Org/work. Php?id=474). Date: 1488–90.