A POLITICAL DEMONSTRATION ON THE WAY TO HYDE PARK
The above picture shows a political demonstration on its way from Trafalgar Square to Hyde Park, where, since the Reform Riot of 1866, vast open-air meetings have been held without let or hindrance from the authorities. The procession has reached the bottom of the Haymarket, and is wending its way along Pall Mall, thinking, it may be, to awe the unimpressionable clubmen. All ordinary traffic is of course stopped, and the police are present in great numbers to keep the course and, if necessary, preserve the peace. But as a general rule, a London crowd is a pattern of good behaviour. At this point, it will be noticed, there are more onlookers than processionists.
source: The Queen's London : a Pictorial and Descriptive Record of the Streets, Buildings, Parks and Scenery of the Great Metropolis, 1896