Looking for the source of a picture of a foot, likely DaVinci?

Question

I need a picture of a left foot, I think that it is by DaVinci. The foot has lines sectoring it showing the relationship of the top to the side. I am doing research into biomechanics and think that I might just expound on this picture. Any help or advice would be appreciated.

Answer 1

don't know that one but there are several anatomy books for artists that have great illustrations of feet from all angles