Labels:text | letter | handwriting | document | ink OCR: CAESAR. Cesare Borgia, son of the late Pope Alexander VI and ally of the French, has hired Leonardo to work for him as a civil and military engineer. Borgia provides the artist with a safe- conduct pass so that he may freely travel in Emilia Romagna, which is controlled by Borgia and his forces. Cesare Borgia Safe-Conduct Pass for Leonardo Fourfour August 18, 1502 Vaprio d'Adda, Archivio Melzi d'Eril e