An exceptional example of the 1873 U.S. Coast Survey's progress chart for the Chesapeake Bay and Delaware Bay Region.  Covers from the mouth of the Susquehanna to Back Bay North Carolina, west as far as Washington D.C. and Richmond, and east as far as Cape May.  Shows triangulation points throughout the Bay as well as all major Island Rivers and inlets.  Lighthouses, ports, cities, beaches, and industrial sites noted.  Prepared under the supervision of Benjamin Peirce for the 1873  Superintendent's Report .
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<a href="https://en.wikipedia.org/wiki/United_States_Coast_Survey" class="extiw" title="en:United States Coast Survey">United States Coast Survey</a></div>
1873 (dated)
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