Google map of sites of Captain Swing arson and threatening letters in northern England:
suffragette meetings advertised in Votes for Women, 1909
SDF meetings advertised in Justice, 13 August 1887
SDF meetings advertised in Justice, 7 January 1888
Maps compiled by other people:
Gibbet sites, 1752-1834 – by the research team at www.criminalcorpses.com: