Statistics for occurrence #1 of “Illinois” in chapter 2, page 164 of George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 3, 15th edition.:

...
mighty cataract,—fittest emblem of eternity,—now sending forward a detachment into the country of the Illinois to prepare the way for his reception. Under the auspices of La Salle, Europeans first pitched a tent at Niagara; it was he who, in 1679, amidst the salvo from his little artillery, and the chantin...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Illinois (Illinois, United States) 6,200 72 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.