Maps are adaptations of 2 from The Era of the Civil War, 1848-1870, vol. III of "The Centennial History of Illinois" by Arthur C. Cole, 1919, published by the Illinois Centennial Commisssion, Springfield, IL.
The Convention was held in Chicago in a specially constructed building called the Wigwam. For more info about the event:
Didn't find what you wanted? Check our Illinois Links.