Statistics for occurrence #1 of “Potomac” in chapter 2 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 8: Soldier Life and Secret Service.:

...ic close, the Southern leaders had infinitely the advantage in the matter of information. The Southern people were practically united, devoted to The scouts and guides of the Army of the Potomac were attached to the secret-service department conducted by Major A. Pinkerton. it was more than difficult for the Union generals to obtain reliable information as to the strength and position of t...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Potomac (Illinois, United States) 2 0 0 0 0 user votes
Potomac (Maryland, United States) 1 0 1 0 0 user votes
Potomac (Montana, United States) 0 0 0 0 0 user votes
Potomac (United States) 0 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.