Dante's Inferno - Canto VIII - Rescue Coming

A signal having been made from the tower, Phlegyas, the ferryman of the lake, speedily crosses it, and conveys Virgil and Dante to the other side. On their passage, they meet with Filippo Argenti, whose fury and torment are described. They then arrive at the city of Dis, the entrance whereto is denied, and the portals closed against them by many Demons. - Dante Alighieri - The Divine Comedy - Inferno - Canto VII