Potomac River at Williamsport, Md., Date based on Detroit, Catalogue P (1906)., "886-G" on negative., Detroit Publishing Co. no. 016565., Gift; State Historical Society of Colorado; 1949, Rivers. , Canals. , United States, Maryland, Chesapeake and Ohio Canal. , United States, Maryland, Williamsport. , United States, Potomac River.

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Keywords: ., canals., rivers., states--maryland--chesapeake, united