"The twelve subjects were selected by the Historical Advisory Committee of the Illinois Sesquicentennial Commission."
Set no. 1. Jolliet and Marquette visit Great Village of the Illinois, August, 1673. The British occupy Fort Chartres, October 10, 1765. George Rogers Clark raids Fort Sackville, February, 1779. Building the first Fort Dearborn, fall, 1803.--set no.. 3. Repeal of the Black Laws, 1864-1865, First steel skeleton skyscraper, 1884-1895. Jane Addams of Hull House, September, 1889. First controlled nuclear chain reaction, December 1942