Triangulation in Wisconsin
1 : 506880 This map shows names of triangulation stations, railroads, counties, rivers, and lakes. The Mississippi River, Lake Winnebago, and Lake Michigan are labeled. The upper right corner includes a key of markings. The map covers north to Eau Claire. Davies, John Eugene Wisconsin Geological Survey
[Coteau des prairies, M'dewakaton country, Warpekutey country, Winebago Indian country, Iowa Territory; middle right.] / by J.N. Nicollet, made in the years 1836, 37, 38, 39 & 40 ; assisted in 1838, 39 & 40 by Lieut. J.C. Frémont of the Corps of Topog...
From Map of the hydrographical basin of the upper Mississippi River : from astronomical and barometrical observations, surveys and information
A Geological Map of Wisconsin
1 : 1710720 This map shows counties, cities, rivers, canals, lakes, railroads, common roads, county towns, townships, villages, and post offices. The map includes part of the upper peninsula of Michigan. Lapham, Increase Allen