For some time a deceitful murderer had been free in heaven, in a company of infernal spirits like himself, and when he was cast toward Gehenna, he seemed to fly about like a black body, or like an inanimate mass, and still-which surprised me-so much subtle poison breathed out from there that it aroused the deceitful and more deceitful sirens, who so sprinkled around and practiced their poisonous tricks, that it is indescribable. For it would take too long to narrate that history. Hence I was allowed to learn what those sirens are like who were later also with me.