ROC6166217:
Recto: Studies of geometry, calculations, and notes, c.1508-10 (pen & ink on paper) (recto of 6166218), Vinci, Leonardo da (1452-1519) / Bridgeman Images
ROC700096:
Studies of the nerves, muscles, the heart, optics and blood flow through the aortic valve, c.1512-13 (pen & ink with chalk on paper), Vinci, Leonardo da (1452-1519) / Bridgeman Images
CPH256963:
Figural Studies for the Adoration of the Magi (Sketches for a Christ Child and Studies of a kneeling and a flying angel), c.1481 (pen & ink over metalpoint on paper), Vinci, Leonardo da (1452-1519) / Bridgeman Images