The Ventricles of the Brain and the Layers of the Scalp
c. 1490-94
A Bearded Old Man (Saint Peter?)
c. 1487-90
Cartoon for the Head of the Infant Saint John the Baptist
c. 1482-83
Head of a Woman
c. 1488-90
Study of violets; technique for soldering a lead covering onto a roof
c. 1487-90