Faden, William,  and Jefferys, Thomas, d. 1771.  "A sketch of the action between the British forces and the American provincials, on the heights of the peninsula of Charlestown, the 17th of June 1775."  Map.  1775.  Norman B. Leventhal Map & Education Center,  https://collections.leventhalmap.org/search/commonwealth:z603vr557 (accessed April 24, 2019).