Des Barres, Joseph F. W. (Joseph Frederick Wallet).  "Coast of Maine showing Blue Hill Bay, Penobscot Bay, Belfast Bay, Islesboro Island, Deer Island, and other islands."  Map.  1776.  Norman B. Leventhal Map & Education Center,  https://collections.leventhalmap.org/search/commonwealth:3f462w25t (accessed February 21, 2019).