3221. The assassin is under the earth: he attempted to open a way for himself to glide out of thence: he proceeded towards Gehenna: they said if his head should emerge here, which continually appeared like a serpent, that then he would suffer irremediable harm [tum immedicabile esset]; but he proceeded again towards the left and spread out, as it were, a cavernous plane towards the right of considerable width, which nevertheless did not afterwards appear.