1834
Thiebault's cabin at the Turtle village was noted in the plat of the Government survey of the township.
The propertyGrade A · 1 independent source
The evidence
“Of the latter class was one Thiebault, a Frenchman, who established himself at the Turtle village probably about the year 1824. His cabin is noted in the plat of the Government survey of the township in 1834. Here he remained until after the arrival of the pioneer settlers of the county.”
1879-history-of-rock-county/08-rock-county-ch02-mounds-indians-black-hawk-settlement.md, PDF p. 320
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