Near to Cordusio is Pier Antonio da Tossano and his brother Serafino. [Footnote: This note is written between lines 23 and 24 of the text No. 710. Corduso, Cordusio (curia ducis) = Cordus in the Milanese dialect, is the name of a Piazza between the Via del Broletto and the Piazza de’ Mercanti at Milan.. In the time of il Moro it was the centre of the town. The persons here named were members of the noble Milanese family de’Fossani; Ambrogio da Possano, the contemporary painter, had no connection with them.]
Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.