On 10 April 1848, Chartists rally on Kennington Common, south London (click for geospatial location). Image: Poster advertising the “Monster” Chartist Demonstration, held on 10 April 1848, proceeding to Kennington Common, Rodney Mace, British Trade Union Posters: An Illustrated History. This image is in the public domain in the United States because its copyright has expired.
Led by Feargus O’Connor, an estimated 25,000 Chartists meet on Kennington Common planning to march to Westminster to deliver a monster petition in favor of the six points of the People’s Charter. Police block bridges over the Thames containing the marchers south of the river, and the demonstration is broken up with some arrests and violence. However, the large scale revolt widely predicted and feared fails to materialize.