This map, created under the auspices of the General Land Office, divided Illinois into square townships 6 miles on each side (though townships at the edges of the state tend to be smaller and irregular in shape). The scale is 18 miles to the inch. The identified towns include Alton, Chicago, Danville, Edwardsville, Galena, Kaskaskia, Palestine, Quincy, Shawneetown, and Springfield, as well as St. Louis in the Missouri Territory, and Vincennes in Indiana. The 3d Principal Meridian runs down the middle of the state. The 4th Principal Meridian lies about 66 miles to the west. The text at bottom left reads “Surveyor Generals Office / Saint Louis 1st October 1839” and “William Milburn /Surveyor General.”
Ref: William Milburn, “Report,” in Public Documents Printed by Order of the Senate of the United States (Washington, D.C., 1841), vol. 3, pp. 57-109.
C. Albert White, A History of the Rectangular Land Survey System (Washington, D.C., 1983).
Currently not on view
Object Name
map: Illinois
date made
Physical Description
paper (overall material)
overall: 24 in x 20 in; 60.96 cm x 50.8 cm
ID Number
accession number
catalog number
Prints from the Physical Sciences Collection
Measuring & Mapping
See more items in
Medicine and Science: Physical Sciences
Prints from the Physical Sciences Collection
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
National Archives and Records Service

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