Map shows public land grid, counties, major cities and towns, "stage" roads and distances, and existing and proposed canals in Illinois. Building locations, mineral resources, and mining activity for Joe Daviess County in Illinois and Iowa County in "Ouisconsin" Territory: on inset. Inset: "Map of the lead mine region east of the Mississippi River." Includes legend, population table based on 1830 census, and table of steamboat routes. Relief shown by hachures and spot heights. Scale [ca. 1:1,840,000] and [ca. 1:1,090,000].