October 1, 1851
The first annual fair of the Rock County Agricultural Society was held at Janesville, in connection with the first fair of the Wisconsin State Agricultural Society; at least five thousand persons attended.
The evidence
“The first fair of the Wisconsin State Agricultural Society was held at Janesville, commencing October 1, 1851. On the second day of the fair, the first annual address was delivered by J.”
1879-history-of-rock-county/12-rock-county-ch06-politics-war-record.md, PDF p. 449 / book p. 453
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
On the printed page (PDF p. 449 / book p. 453) · open the whole page “The first fair of the Wisconsin State Agriculture Society was held at Janesville, commencing October 1, 1851. On the second day of the fair the first annual address was delivered by J.”
1908-brown-rock-county/17-agriculture.md, Vol. 1, PDF p. 444 / book p. 411
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 · may repeat 1879-history-of-rock-county, so not counted as independent
On the printed page (Vol. 1, PDF p. 444 / book p. 411) · open the whole page