PLATE 1. Birds in flight, 1505. Codex Sul Volo, folio 8r.
PLATE 2. Andrea del Verrocchio and Leonardo da Vinci, The Baptism of Christ, c. 1470–75. Uffizi Gallery, Florence.
PLATE 3. Study of the rotation of the arm, c. 1509–10. Windsor Collection, Anatomical Studies, folio 135v.
PLATE 4. Rotated views of the muscles of the shoulder and arm, c. 1509–10. ...