... little valley. Dante, with his companions, goes down to join the "mighty shades," and is met by one whom he at once recognises as an old friend, the Pisan noble Giovanni, or Nino de' Visconti, "judge" or governor of the Sardinian province called Gallura, nephew of Count Ugolino. After some talk Dante notices the three stars spoken of above, and at the same moment Sordello draws Virgil's attention to an "adversary." They see a serpent making its way through ... — Dante: His Times and His Work • Arthur John Butler