Canto XIX. By means of another rocky bridge the travellers reach the third gulf, where are punished all who have been guilty of simony. These are sunk, head first, in a series of burning pits, whence emerge only the red-hot soles of their convulsively agitated feet. Seeing a ruddier flame hover over one pair of soles, Dante timidly inquires to whom they belong, whereupon Virgil, carrying him down to this spot, bids him seek his answer from the culprit himself. Peering down into the stone-pit, Dante then timidly proffers his request, only to be hotly reviled by Pope Nicholas III, who first mistakes his interlocutor for Pope Boniface, and confesses he was brought to this state by nepotism. But, when he predicts a worse pope will ultimately follow him down into this region, Dante sternly rebukes him.
Canto XX. Virgil is so pleased with Dante's speech to Pope Nicholas that, seizing him in his arms, he carries him swiftly over the bridge which leads to the fourth division. Here Dante beholds a procession of chanting criminals whose heads are turned to face their backs. This sight proves so awful that Dante weeps, until Virgil bids him note the different culprits. Among them is the witch Manto, to whom Mantua, his native city, owes its name, and Dante soon learns that all these culprits are the famous soothsayers, diviners, magicians, and witches of the world, who thus are punished for having presumed to predict the future.
Canto XXI. From the top of the next bridge they gaze into a dark pit, where public peculators are plunged into boiling pitch, as Dante discovers by the odor, which keenly reminds him of the shipyards at Venice. Virgil there directs Dante's attention toward a demon, who hurls a sinner headlong into the boiling tar, and, without watching to see what becomes of him, departs in quest of some other victim. The poet also perceives that, whenever a sinner's head emerges from the pitchy waves, demons thrust him down again by means of long forks. To prevent his charge falling a prey to these active evil spirits, Virgil directs Dante to hide behind a pillar of the bridge and from thence watch all that is going on.
While Dante lurks there, a demon, descrying him, is about to attack him, but Virgil so vehemently proclaims they are here by Heaven's will that the evil spirit drops his fork and becomes powerless to harm them. Perceiving the effect he has produced, Virgil then summons Dante from his hiding-place, and sternly orders the demon to guide them safely through the ranks of his grimacing fellows, all of whom make obscene gestures as they pass.
Canto XXII. Dante, having taken part in battles, is familiar with military manoeuvres, but he declares he never behold such ably marshalled troops as the demon hosts through which they pass. From time to time he sees a devil emerge from the ranks to plunge sinners back into the lake of pitch, or to spear one with his fork and, after letting him squirm aloft for a while, hurl him back into the asphalt lake. One of these victims, questioned by Virgil, acknowledges he once held office in Navarre, but, rather than suffer at the hands of the demon tormentors, this peculator voluntarily plunges back into the pitch. Seeing this, the baffled demons fight each other, until two actually fall into the lake, whence they are fished in sorry plight by fellow-fiends.
Canto XXIII. By a passage-way so narrow they are obliged to proceed single file, Dante and Virgil reach the next division, the author of this poem continually gazing behind him for fear lest the demons pursue him. His fears are only too justified, and Virgil, seeing his peril, catches him up in his arms and runs with him to the next gulf, knowing demons never pass beyond their beat.
"Never ran water with such hurrying pace
Adown the tube to turn a land-mill's wheel,
When nearest it approaches to the spokes,
As then along that edge my master ran,
Carrying me in his bosom, as a child,
Not a companion."
In the sixth division where they now arrive, they behold a procession of victims, weighed down by gilded leaden cowls, creeping along so slowly that Dante and Virgil pass all along their line although they are not walking fast. Hearing one of these bowed figures address him, Dante learns that, because he and his companions were hypocrites on earth, they are doomed to travel constantly around this circle of the Inferno, fainting beneath heavy loads.
A moment later Dante notices that the narrow path ahead of them is blocked by a writhing figure pinned to the ground by three stakes. This is Caiaphas, who insisted it was fitting that one man suffer for the people and who, having thus sentenced Christ to the cross, has to endure the whole procession to tramp over his prostrate form. The cowled figure with whom Dante is conversing informs him, besides, that in other parts of the circle are Ananias and the other members of the Sanhedrim who condemned Christ. Deeming Dante has now seen enough of this region, Virgil inquires where they can find an exit from this gulf, and is shown by a spirit a steep ascent.
Canto XXIV. So precipitous is this passage that Virgil half carries his charge, and, panting hard, both scramble to a ledge overhanging the seventh gulf of Malebolge, where innumerable serpents prey upon naked robbers, whose hands are bound behind them by writhing snakes. Beneath the constant bites of these reptiles, the robber-victims turn to ashes, only to rise phoenix-like a moment later and undergo renewed torments. Dante converses with one of these spirits, who, after describing his own misdeeds, prophesies in regard to the future of Florence.