De Costa, J.,  Hall, Charles,  and Henry Stevens Son & Stiles.  "A plan of the town and harbour of Boston, and the country adjacent with the road from Boston to Concord shewing the place of the late engagement between the King's troops & the provincials, together with the several encampments of both armies in & about Boston."  Map.  1911.  Norman B. Leventhal Map & Education Center,  https://collections.leventhalmap.org/search/commonwealth:wd3767994 (accessed February 20, 2020).