Statistics for occurrence #1 of “Potomac river” in chapter 1.1 of Southern Historical Society Papers, Volume 20.:

...the Navy will be at Old Point by the Baltimore boat this evening. Do not move the ships until further orders, which he will carry. Had the first order been executed and these vessels moved up the Potomac river the victory of the Merrimac would have been shorn of its chief triumphs. On this day the United States Government had at anchor in Hampton Roads, near Fort Monroe, besides twelve gunboats, m...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Potomac River (United States) 286 0 0 0 0 user votes
Potomac River (Maryland, United States) 2 0 0 0 0 user votes
Potomac River (Maryland, United States) 2 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.