1856. U.S. Coast and Geodetic Survey. L.D. Williams, Draughtn. U.S.C.S. 110 x 107 centimeters Scale 1:2,500,000 General Map Collection. The Survey (Washington).
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1909. U.S. Coast and Geodetic Survey. Prepared ... from British and Canadian maps. 44 x 72 centimeters Scale approximately 1:2,553,000 General Map Collection. The Survey (Washington).