_Canto X._ Gingerly treading between burning tombs and fortress wall, Virgil conducts Dante to an open sepulchre, where lies the Ghibelline leader Farinata. Partly rising out of his glowing tomb, this warrior informs Dante that the Guelfs--twice driven out of Florence--have returned thither. At that moment another victim, peering over the edge of his coffin, anxiously begs for news of his son Guido, thus proving that, while these unfortunates know both past and future, the present remains a mystery to them. Too amazed at first to speak, Dante mentions Guido in the past tense, whereupon the unhappy father, rashly inferring his son is dead, plunges back into his sepulchre with a desperate cry. Not being able to correct his involuntary mistake and thus comfort this sufferer, Dante begs Farinata to inform his neighbor, as soon as possible, that his son is still alive. Then, perplexed by all he has seen and heard, Dante passes thoughtfully on, noting the victims punished in this place, until, seeing his dismay, Virgil comforts him with the assurance that Beatrice will explain all he wishes to know at the end of his journey. _Canto XI._ The poets now approach a depression, whence arises a stench so nauseating that they are compelled to take refuge behind a stone tomb to avoid choking. While they pause there, Dante perceives this sepulchre bears the name of Pope Anastasius, who has been led astray. Tarrying there to become acclimated to the smell, Virgil informs his companion they are about to pass through three gradations of the seventh circle, where are punished the violent, or those who by force worked injury to God, to themselves, or to their fellow-men. _Canto XII._ His charge sufficiently prepared for what awaits him, Virgil leads the way down a steep path to the next rim, where they are confronted by the Minotaur, before whom Dante quails, but whom Virgil defies by mentioning Theseus. Taking advantage of the moment when the furious, bull-like monster charges at him with lowered head, Virgil runs with Dante down a declivity, where the stones, unaccustomed to the weight of mortal feet, slip and roll in ominous fashion. This passage, Virgil declares, was less dangerous when he last descended into Hades, for it has since been riven by the earthquake which shook this region when Christ descended into hell. Pointing to a boiling river of blood (Phlegethon) beneath them, Virgil shows Dante sinners immersed in it at different depths, because while on earth they offered violence to their neighbors. Although anxious to escape from these bloody waters, the wicked are kept within their appointed bounds by troops of centaurs, who, armed with bows and arrows, continually patrol the banks. When these guards threateningly challenge Virgil, he calmly rejoins he wishes to see their leader, Chiron, and, while awaiting the arrival of this worthy, shows Dante the monster who tried to kidnap Hercules' wife.