Vol. I: VII. On the Proportions and on the Movements of the Human Figure: 347.
The Da Vinci Notebooks
a b c are equal to each other and to the foot and to the space between the nipple and the navel d e will be the third part of the whole man.
f g is the fourth part of a man and is equal to g h and measures a cubit.
183:166 : See Pl. XIX, No. 1. 1. mamolino (=bambino, little child) may mean here the navel.