Significantly revised and updated version of HS Tanner's large format map of Missouri and Illinois Territories, first issued in 1821.
The map includes remarkable detail where there had been relatively little detailed cartographic work to date. The township surveys have begun and both counties have a number of early counties but the settlement and geopolitical boundaries are still in their infancy. In the first edition, the upper part of Illinois is still Sauk and Fox Indian Lands. Chicago is part of the Boundary Lands. In this 1831 edition the region is now part of Illinois.
The Patawama Indian Land is shown south of Chicago along with massive Edgar and Fayette Counties. In Missouri a massive Osage area is shown in the west, along with a huge Wayne County and large area above described as attached to Gasconade County. Many early roads are shown, primarily following rivers or connecting cities to the mining regions.