I was looking at this because for my thesis I've gathered a whole bunch of data on civil rights protest in Britain, most of it qualitative but with over 100 discrete events in a spreadsheet, and I want to design something to visually represent the changing nature of black protest (as an extension of political participation) in Britain from 1960-1965, my timeframe.
What I have in terms of data for each event, culled from newspapers and organizations, are the date, the type of protest (strike, boycott, sit-in, etc.), the location, a rough estimate of the number of participants, the organizations involved, and the goal/target of the event, as well as some other odds and ends. General trends I can observe are an overall increase in protest events, an increase in participation in those events, a change in the events from 'low cost' protests such as marches to 'high cost' protests like boycotts and strikes, and a move from 'solidarity protests' held in London to address concerns about empire and allies (namely the US) to protest directed more specifically at Britain and local authorities.
If anyone has a great idea of how to represent that with an image, or two or three, lay it on me.