The Da Vinci Notebooks at sacred-texts.com
Here I make a note to demonstrate the difference there is between man and the horse and in the same way with other animals. And first I will begin with the bones, and then will go on to all the muscles which spring from the bones without tendons and end in them in the same way, and then go on to those which start with a single tendon at one end.
120:428 : See Pl. CVIII, No. 2.