Plate 5: four ears, from 'The Book for Learning to Draw' (Livre pour apprendre à dessiner)

Plate 5: Four ears, from "The Book for Learning to Draw" (Livre pour apprendre à dessiner)

Stefano della Bella, Israël Henriet

Plate 3: Six eyes, three ears, two profiles, and a mouth, from "The Book for Learning to Draw" (Livre pour apprendre à dessiner)

Stefano della Bella, Israël Henriet

Design: Facial Anatomy from Encyclopédie

A. J. Defehrt

Crayon-Manner Engraving, from Encyclopédie

A. J. Defehrt

Studie van een gezicht en oren

Unknown Artist

Studieblad met een oor en een arm

Unknown Artist

Four Heads (from Characaturas by Leonardo da Vinci, from Drawings by Wincelslaus Hollar, out of the Portland Museum)

After Wenceslaus Hollar, After Leonardo da Vinci, Published London by John Clarke

Four Heads (from Characaturas by Leonardo da Vinci, from Drawings by Wincelslaus Hollar, out of the Portland Museum)

After Wenceslaus Hollar, After Leonardo da Vinci, Published London by John Clarke

Design: Ovals, from Encyclopédie

Benoît-Louis Prévost

Design: Facial Anatomy from Encyclopédie

Benoît-Louis Prévost

Four Heads (from Characaturas by Leonardo da Vinci, from Drawings by Wincelslaus Hollar, out of the Portland Museum)

After Wenceslaus Hollar, After Leonardo da Vinci, Published London by John Clarke

Four Heads (from Characaturas by Leonardo da Vinci, from Drawings by Wenceslaus Hollar, out of the Portland Museum)

After Wenceslaus Hollar, After Leonardo da Vinci, Published London by John Clarke