Rev. Milton Bourne's pastorate (Sept. 1840 to 1842) ended and Rev. Alpha Warren's (Sept. 1842 to 1843) began.

The evidence

• “Rev. Milton Bourne, Sept., 1840 to 1842; Rev. Alpha Warren, Sept., 1842 to 1843; Rev.”

  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