George, III, King of Great Britain,  George, IV, King of Great Britain,  and Southack, Cyprian.  "An Exact Draught of Bostone harbour, with a Survey of most of the Islands about it."  Map.  1711.  Norman B. Leventhal Map Center,  https://collections.leventhalmap.org/search/commonwealth:hx11z575j (accessed September 20, 2017).