Johnson's Illinois

This is a colorful 2-page map from Johnson's Atlas published in either 1870 or 1871 (I have not found a way to distinguish between these two years) showing great details of the State of Illinois. Colored by counties, this map shows railroads, roads, places, towns, canals, rivers, and some detail on neighboring states.

A great resource for all kinds of information on Johnson's Atlases and maps is "Ira Lourie's Johnson U.S. Map Project" which can be found at www.johnsonmapproject.org. There is a handy US Map Identifier tool there that can help identify editions of all of his maps. This is Map v7.0 of the possible editions returned in the site's Map Identifier and is listed as an average rarity.