Note 845 — CANTO XXXIII.
James Romanes Sibbald translation
That he betrayed, etc.: Dante seems here to throw doubt on the charge. At the height of her power Pisa was possessed of many hundreds of fortified stations in Italy and scattered over the Mediterranean coasts. The charge was one easy to make and difficult to refute. It seems hard on Ugo that he should get the benefit of the doubt only after he has been, for poetical ends, buried raging in Cocytus.