Statistics for occurrence #1 of “Long Bridge” in chapter 6, page 98 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 5: Forts and Artillery.:

...ound by the north and east of the city to the Anacostia, and eleven forts south of the Anacostia, with the right of the line resting on the Potomac. Of these, Fort Runyon, already noted as covering Long Bridge on the Virginia side, was the largest, with a perimenter of one thousand five hundred yards, but the size of the remainder varied to a minimum of one hundred and fifty-four yards. Most of them were e...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Long Bridge (Pennsylvania, United States) 258 22 2 0 0 user votes
Long Bridge (Louisiana, United States) 12 0 0 0 0 user votes
Long Bridge (New York, United States) 10 0 0 0 0 user votes
Long Bridge (Louisiana, United States) 0 0 0 0 0 user votes
Long Bridge (New Jersey, 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.