
The Big Sioux River carves a sharp boundary between South Dakota and Iowa on this late-nineteenth-century landscape, defining the eastern edge of the survey. The region is a dense grid of emerging townships and expanding rail lines, where the Chicago Milwaukee and St. Paul R.R. and the Chicago and Northwestern R.R. intersect at vital junctions like Canton and Worthing. This network facilitated the rapid growth of agricultural hubs such as Lennox and Centerville, which are shown near the Vermillion River.
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This is the sole edition of this map. No revisions or reprints were ever made.
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