Date: | 1916 |
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Description: | In 1916, it was estimated that 15,000 Indian mounds had formerly existed in Wisconsin. In the early 20th century, the Wisconsin Archaeological Society surv... |
Date: | 1872 |
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Description: | This map, which includes eastern Iowa, northern Illinois and a portion of Michigan's Upper peninsula, shows the township survey grid and identifies countie... |
Date: | 1919 |
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Description: | Narrow red lines show principal secondary highways. Green circles shows points of historical interest. Green triangles show Indian mounds and Indian villag... |
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