Of Tartarus, which, with its heavy shades,710
Dense vapor shrouds. Hence, from a single source,
Two different rivers flow: with silent stream
One bears along the sacred Stygian waves
On which the gods take oath; with mighty roar
The other fiercely rolls the rocks along
Within its flood, the raging Acheron,715
Which may not be recrossed. Set opposite,
By these two streams encircled, stands the hall
Of royal Dis; and by a shading grove