Context

Context of Comparative map of Cape Cod Harbor : showing physical changes between the survey of Maj. J.D. Graham in 1835 and the U.S. Coast Survey, Benjamin Peirce, Supt. in 1867, topography and hydrography executed during parts of Sept. Oct. and Nov. 1867 by the party in charge of Henry L. Whiting ; made for the State Commission for the protection and preservation of Cape Cod Harbor to accompany report
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