Statistics for occurrence #1 of “Illinois” in chapter 9 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 10: The Armies and the Leaders.:

...an, of Fort Scott, Arkansas, that in February, 1866, he, with Doctors Hamilton and George H. Allen, assisted Doctor Stephenson in compiling ritualistic work, constitution, and by-laws at Springfield, Illinois , and these four assumed the obligations of the Grand Army of the Republic at that time. It is conceded that the initiatory steps to constitute the order were taken in Illinois, and Doctor Stephenso...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Illinois (Illinois, United States) 6,200 40 0 0 0 user votes
Illinois (New Mexico, United States) 4 0 0 0 0 user votes
Illinois (Oregon, United States) 2 0 0 0 0 user votes
Illinois (Colorado, United States) 0 0 0 0 0 user votes
Illinois (Illinois, United States) 0 0 0 0 0 user votes
Illinois (New Mexico, United States) 0 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.