Survey of the Illinois River, 1867
Title page of the Survey of the Illinois River, authorized by Congress in 1867 for the purpose of assessing needs for navigational improvements.
From the collection of the Illinois State Historical Library
Survey of the Illinois River, 1867
Title page of the Survey of the Illinois River, authorized by Congress in 1867 for the purpose of assessing needs for navigational improvements.From the collection of the Illinois State Historical Library