Barnaby Rudge by Charles Dickens

A mob is usually a creature of very mysterious existence, particularly in a large city. Where it comes from or whither it goes, few men can tell. Assembling and dispersing with equal suddenness, it is as difficult to follow to its various sources as the sea itself; nor does the parallel stop here, for the ocean is not more fickle and uncertain, more terrible when roused, more unreasonable, or more cruel.

The people who were boisterous at Westminster upon the Friday morning, and were eagerly bent upon the work of devastation in Duke Street and Warwick Street at night, were, in the mass, the same. Allowing for the chance accessions of which any crowd is morally sure in a town where there must always be a large number of idle and profligate persons, one and the same mob was at both places. Yet they spread themselves in various directions when they dispersed in the afternoon, made no appointment for reassembling, had no definite purpose or design, and indeed, for anything they knew, were scattered beyond the hope of future union.