Government Surveyors noted eight mounds on the west shore of Lake Koshkonong.

The evidence

• “Some had been opened, and were said in most cases to have contained remains of human skeletons, frequently of several persons in the same mounds. In 1834, the Government Surveyors noted eight mounds on the west shore of Lake Koshkonong,”

  1879-history-of-rock-county/08-rock-county-ch02-mounds-indians-black-hawk-settlement.md, PDF p. 319 / book p. 323

  Butterfield, C. W., et al. The History of Rock County, Wisconsin: its early settlement, growth, development, resources, etc. Chicago: Western Historical Company, 1879. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871585.

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