November 1840
Mr. Adams was succeeded by Rev. Dexter Clary, who became minister (1840–1850) and, per the 1908 history, the first pastor of the First Congregational church.
The evidence
“Mr. Adams was succeeded in Nov, 1840, by Rev. Dexter C.”
1856-history-of-rock-county/06-beloit.md, PDF p. 72 / book p. 54
Guernsey, Orrin, and Josiah F. Willard, editors. History of Rock County, and Transactions of the Rock County Agricultural Society and Mechanics' Institute. Janesville, Wis.: William M. Doty & Brother, 1856. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871593.
Grade A: Found on a page of one of our sources
On the printed page (PDF p. 72 / book p. 54) · open the whole page “In November, 1840, Rev. Dexter Clary became the minister (1840-1850), and Mrs. Sarah M., his wife, came with him.”
1908-brown-rock-county/13-beloit-churches.md, Vol. 1, PDF p. 287 / book p. 263
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
On the printed page (Vol. 1, PDF p. 287 / book p. 263) · open the whole page