August 23, 1843
Mr. Chapin married Miss Martha Cotton (spelled "Colton" in the 1908 history), of Lenox, Mass.
The evidence
“Mr. Chapin was married to Miss Martha Cotton, of Lenox, Mass., Aug. 23, 1843. After her death, he married as his second wife.”
1879-history-of-rock-county/18-bios-beloit.md, PDF p. 737
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. 737) · open the whole page “August 23, 1843, occurred his marriage to Miss Martha Colton, of Lenox, Mass. After her death he married Miss Fannie L.”
1908-brown-rock-county/15-colleges.md, Vol. 1, PDF p. 345 / book p. 317
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. 345 / book p. 317) · open the whole page