Women's Suffrage Float in Sane Fourth parade, Chicago, IL – July 4, 1910. Chicago History Museum, ICHi-20157; Charles R. Clark, photographer.
Online Primary Sources
Chronology of the Women's Rights Movement in Illinois by Catharine Waugh McCulloch. Covers the movement from 1855-1913.
Sidelights on Illinois Suffrage History by Grace Wilbur Trout.
Biography of Mary Livermore – an early and important figure in the Illinois movement.
Biography of Ruth Hanna McCormick – an important figure in the 20th century suffrage movement.
The six volumes of The History of Woman Suffrage includes a lot of information about Illinois.
The writings of Illinois Suffragist Hazle Buck Ewing have been digitized at Illinois State University in Bloomington-Normal. The collection includes her activist writings, her incoming letters from dozens of other suffragists, and materials from her work with the National Woman's Party and Congressional Union for Woman Suffrage. More here.