Give the anatomy of the leg up to the hip, in all views and in every action and in every state; veins, arteries, nerves, sinews and muscles, skin and bones; then the bones in sections to show the thickness of the bones.
[Footnote: A straightened leg in profile is sketched by the side of this text.]
Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.