Statistics for occurrence #1 of “Potomac River” in chapter 11 of Benson J. Lossing, Pictorial Field Book of the Civil War. Volume 3.:

...arrived at Fredericksburg at near midnight after a ride of nearly fifty miles, with a dozen sketches made during the day, and left the next morning for Washington City, by way of Acquia Creek and the Potomac River . We have observed that when the Army of the Potomac emerged from The Wilderness, Sheridan was sent to cut Lee's communications. This was the first of the remarkable raids of that remarkable lea...
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.