v. 1. Preliminary chapter: Description of Purgatory. Time occupied in passing through Purgatory and supposed date of the vision. The principal divisions of the Purgatorio. Date when the Purgatorio was written. Nature of the Purgatorio as compared with the Inferno. Dante's itinerary through Purgatory. Supplementary list of authors and editions quoted (v.1, p. xivii-lii) Text, translation, and commentary, canto I-XV -- v. 2. Text, translation, and commentary, canto XVI-XXXIII. Index