This primary source comes from the Records of the Office of the Chief of Engineers.
Full Citation: Map of the United States Showing the Acquisition of National and Public Domain West of the Mississippi River through Cession from Foreign Nations; 1853; United States; War Department Map Collection, 1939 - 1942; 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/map-of-the-united-states-showing-the-acquisition-of-land, May 7, 2024]