Extract from the last part:
But lo, a stir is in the air!
The wave- there is a movement there!
As if the towers had thrust aside,
In slightly sinking, the dull tide-
As if their tops had feebly given
A void within the filmy Heaven.
The waves have now a redder glow-
The hours are breathing faint and low-
And when, amid no earthly moans,
Down, down that town shall settle hence,
Hell, rising from a thousand thrones,
Shall do it reverence.