The Da Vinci Notebooks at sacred-texts.com
The eddy made by the Mensola, when the Arno is low and the Mensola full.
229:537 : Mensola is a mountain stream which falls into the Arno about a mile and a half above Florence.
A=Arno, I=Isola, M=Mvgone, P=Pesa, N=Mesola.