Figure 5.22: The ecology of selected ethnic islands in Wisconsin. The English are found more often in the better farmland south of the border of the North Woods. Some of the English were miners from Cornwall, and they were drawn to the lead-mining country of southwestern Wisconsin, where they could practice the profession already known to them. Icelanders, an island people, chose an island as their settlement site in Wisconsin.
(Source: After Hill, 1942.)