Benvenuto Cellini (15001571). Autobiography. The Harvard Classics. 190914.
ABOUT that time the Duke went on a journey, attended by all his court and all his sons, except the prince, who was in Spain. They travelled through the Sienese Maremma, and by this route he reached Pisa. The poison from the bad air of those marshes first attacked the Cardinal, who was taken with a pestilential fever after a few days, and died at the end of a brief illness. He was the Dukes right eye, handsome and good, and his loss was most severely felt. I allowed several days to elapse, until I thought their tears were dried, and then I betook myself to Pisa.