Studies of Male Figures; A Hygrometer; A Mother and Child
c. 1480-81
The Ventricles of the Brain and the Layers of the Scalp
c. 1490-94
Measured Study of a Foot
c. 1490-92
Cartoon for the Head of the Infant Saint John the Baptist
c. 1482-83
Head of a Woman
c. 1488-90