Explore Chicago Collections
https://explore.chicagocollections.org/records/?f4-institutions=Chicago%20History%20Museum&f2-types=Archival%20Collections&f1-cities=Joliet&f5-types=Archival%20Collections&f6-types=Archival%20Collections&f3-topics=Events%20%26%20Movements::Haymarket%20Affair