These two spirits prove to be Guido del Duca and Rinieri da Calboli. ↩

A mountain in the Apennines, northeast of Florence, from which the Arno takes its rise. Ampère, Voyage Dantesque , p. 246, thus describes this region of the Val d’ Arno:⁠—

“Farther on is another tower, the tower of

Porciano