Mining at Fever river, Illinois, was extended into the Winnebago country and caused an Indian uprising that year.

The evidence

• “The AVinnebagoes claimed possession over other Indians and so, in 1825, a treaty of peace was made at Prairie du Chien to settle the boundaries between Winnebagoes, Sacs, Foxes, Chippewas, lowas, Ottawas and Pottawattomics. But during the year 1827 mining at Fever river, Illinois, was extended into the Winnebago country and caused an Indian uprising that year. In 1828 Colonel Henry Dodge and 130 men were digging ore thirty miles within Wisconsin lands, removing the ore across the line by night.”

  1908-brown-rock-county/02-ancient-occupants.md, Vol. 1, PDF p. 39 / book p. 31

  Brown, William Fiske, editor. Rock County, Wisconsin: A New History of Its Cities, Villages, Towns, Citizens and Varied Interests, from the Earliest Times, Up to Date. Chicago: C. F. Cooper & Co., 1908. 2 vols. archive.org/details/rockcountywiscon01brow, archive.org/details/rockcountywiscon02brow.

  Grade A: Found on a page of one of our sources