Rev. Zadock Hall served from September 1845 to 1846 (succeeding W. Munger, Sept. 1843 to 1845), and Rev. Niles Kinne served from January 22, 1845.

The evidence

• “W. Munger, Sept, 1843 to 1845; Rev. Zadock Hall, Sept., 1845 to 1846, A house of worship was built in 1847, at a cost of $4,300. 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

  

• “Rev. John Trowbridge, June 1, 1844 to January 1, 1845 ; Rev. Niles Kinne, January 22, 1845 to April 2, 1850; Rev.”

  1908-brown-rock-county/13-beloit-churches.md, Vol. 1, PDF p. 301 / book p. 275

  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