Southack, Cyprian,  Mount, Richard, d. 1722,  Page, T. (Thomas), b. 1713,  and Bowen, Emanuel, d. 1767.  "The harbour of Casco Bay and islands adjacent."  Map.  1720.  Norman B. Leventhal Map & Education Center,  https://collections.leventhalmap.org/search/commonwealth:6t053q08m (accessed August 15, 2018).