The Aeneid - pg. 171

"Cocytus is the deep pool that you see,

The swamp of Styx beyond, the infernal power

By which the gods take oath and fear to break it.

All in the nearby crowd you notice here

Are pauper souls, the souls of the unburied.

Charon's the boatman. Those the water bears

Are souls of buried men. He may not take them

Shore to dread shore on the hoarse currents there

Until their bones rest in the grave, or till

They flutter and roam this side a hundred years;

They mar have passage then, and may return

To cross the deeps they long for."