1858
Officials were elected or took office: a Register of Deeds (removing to Janesville), a mayor of Janesville (holding two years), a mayor of Beloit (Anson P. Waterman, re-elected for 1858), a district attorney of Rock county, and a clerk of the circuit court (serving to 1866).
The evidence
“In 1851, he was appointed to fill a vacancy as Director of the Milwaukee & Mississippi Railroad; was afterward twice elected to the same position. In 1858, he was elected Register of Deeds ; his duties required his removal to Janesville, where he remained until the summer of 1863. Mr.”
1879-history-of-rock-county/30-bios-union.md, PDF p. 862 / book p. 866
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
“Hudson was elected to preside. In 1858 he was elected mayor of Janesville, and held that office two years. In 1863 he was again elected presiding magistrate of the City court, and held the office seven years consecutively and two years at a subsequent period, in all nine years.”
1908-brown-rock-county/32-courts-and-legal-profession.md, Vol. 2, PDF p. 260 / book p. 761
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