Read it through once

Returning from one of these dark walks they reached a great gravel-cliff immediately over the levels, where they stood still and listened. The water was now high in the streams, squirting through the weirs, and tinkling under culverts; the smallest gullies were all full; there was no taking short cuts anywhere, and foot-passengers were compelled to follow the permanent ways. From the whole extent of the invisible vale came a multitudinous intonation; it forced upon their fancy that a great city lay below them, and that the murmur was the vociferation of its populace.