Johnston, Thomas,  Heath, Joseph,  Jones, Phineas,  North, John,  Jones, Ephraim,  Hutchinson, E.,  and Plymouth Company.  "This plan of Kennebeck & Sagadahock Rivers & country adjacent."  Map.  1754.  Norman B. Leventhal Map Center,  https://collections.leventhalmap.org/search/commonwealth:z603vm790 (accessed November 18, 2017).