Henry Dodge was appointed governor of Wisconsin Territory; the 1908 history gives his term as beginning May 13, 1845, a discrepancy with the April 8 date.

The evidence

• “Tallmadge, appointed June 21st, 1844. Henry Dodge, appointed April 8th, 1845. Nelson Dewey, elected May 8th, 1848; re-electod Nov. 5th, 1849, Leonard J, Farwell, elected Nov. 4th, 1851.”

  1856-history-of-rock-county/01-wisconsin.md, PDF p. 22 / book p. 4

  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

• “– December 4, 1844: James K. Polk elected President of the United States . January 23, 1845: The United States Congress established a uniform date for the holding of federal elections — the first Tuesday after the first Monday in November, on even-numbered years. March 1, 1845: President John Tyler signed a bill approving the annexation of Texas . March 4, 1845: Inauguration of James K. Polk as the 11th President of the United States. April 8, 1845: Henry Dodge appointed 4th Governor of the Wisconsin Territory. December 2, 1845: President James K. Polk announced to Congress that the Monroe Doctrine should be strictly enforced, and that the United States should aggressively expand into the West . December 29, 1845: Texas was admitted to the United States as the 28th U.S. state . April 25, 1846: The Thornton Affair occurred on disputed land between Texas and Mexico, initiating the Mexican–American War . May 13, 1846: The United States officiall”

  https://en.wikipedia.org/wiki/4th_Wisconsin_Territorial_Assembly

  en.wikipedia.org, https://en.wikipedia.org/wiki/4th_Wisconsin_Territorial_Assembly

  Grade B: Found on an institutional web page