Date: | 1840 |
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Description: | This map, one of a series made by Thomas Jefferson Cram of the U.S. Topographical Engineers from personal surveys, shows the portage connecting the Wiskons... |
Date: | 1840 |
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Description: | This map shows a line of proposed construction for defending the north side of the canal against inundation from the Wisconsin River and location of Fort W... |
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