Sanborn, D. A. (Daniel Alfred), -1883.  "Insurance map of Charlestown : portions of Roxbury (now annexed to Boston) and Cambridge : 1868 : corrected Nov. 1871."  Map.  1871.  Norman B. Leventhal Map & Education Center,  https://collections.leventhalmap.org/search/commonwealth:ht24zw73n (accessed March 18, 2019).