The Haymarket martyrs and the first May Day
The eight hours working day movement lies at the bottom of the whole affair. Early in 1886, the Chicago employers were filching away from their employed the priviledge recently unreasonable length than ten or eleven hours. Against this familiar device of the masters, many meetings of the men were held in Chicago in the earlier months of 1886. One of these meetings was called in the Haymarket, for the evening of May 4th. It was called by the Anarchists. A special protest was to be made against the killing of seven unarmed people a few days earlier, outside McCormick’s premises, by Pinkerton detectives.
Eleanor Marx Aveling and Edward Aveling, The Chicago Anarchists.