Inferno and start of Purgatorio 11-5-10

More on the Inferno, and on Ulysses and Ugolina; Dante's attitude towards the damned compared with God's and with Virgil's.  The naming of Ugolino's sons in his song.  The relation of the seven increasing sins in Inferno and their reverse-order decrease in Purgatorio.  The likewise increasing uncertainty of Virgil in Purgatorio.  Ulysses on the short vigil of the senses.  Merwin and Heaney as translators of Dante into a genuinely poetic vernacular.