Book 6.548-556
Aeneas looks at the walls of Dis and sees the waters of the Phlegethon. The Fury Tisiphone guards the city.
Respicit Aeneas subito, et sub rupe sinistra
548
moenia lata videt, triplici circumdata muro,
549
quae rapidus flammis ambit torrentibus amnis,
550
Tartareus Phlegethon, torquetque sonantia saxa.
551
Porta adversa ingens, solidoque adamante columnae,
552
vis ut nulla virum, non ipsi exscindere bello
553
caelicolae valeant; stat ferrea turris ad auras,
554
Tisiphoneque sedens, palla succincta cruenta,
555
vestibulum exsomnis servat noctesque diesque,
556