Study on the proportions of head and eyes
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Pen and ink, 197 x 160 mm
Biblioteca Reale, Torino
Comparison of scalp skin and onion
1489
Pen, ink and red chalk on paper, 203 x 152 mm
Royal Library, Windsor
Studies of human skull
1489
Pen, ink and black chalk on paper, 188 x 134 mm
Royal...