This primary source comes from the Records of the Office of the Chief of Engineers.
Full Citation: Sketch of Public Surveys in Michigan; 1855; United States; Civil Works Map File, 1818 - 1947; Records of the Office of the Chief of Engineers, Record Group 77; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/sketch-of-public-surveys-in-michigan, May 8, 2024]