September 28, 1846
A settler's father died (buried on the farm).
The regionGrade A · 1 independent source
The evidence
“S. C. was educated in a district school, kept in a log hut ; his father died on Sept. 28, 1846 ; his mother in September, 1874 ; they were buried on the farm — ^a place selected by the father. The children have erected a monument, eleven feet high, in memory and to mark the resting place of their parents.”
1879-history-of-rock-county/25-bios-milton.md, PDF p. 811 / book p. 815
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