DIVINE COMEDY Purgatory; canto XIX. "With the wings open which seemed to be a swan / Let him speak to us up / Between two walls of the hard boulder." (II; XIX; 46-48). In an allegorical frame of the work: on the left the Supreme Poet Dante Alighieri (1265-1321) at the desk; on the right the Angel of solicitude shows the way to the two wayfarers. Chromolithography from a series by Egisto Sborgi Editore; Florence 1918