Statistics for occurrence #1 of “Fitz John Porter” in chapter 10 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 4: The Cavalry:

... be obtained, and I returned to my chief reporting the condition of affairs. It was apparent from movements in our front that the Confederates would make a supreme effort to force the left flank of Fitz John Porter 's command, and cutting it off from the bridge over the Chickahominy, sever it from McClellan's army, and capture or disperse it. It was growing late. Both armies were exhausted by the exertions...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Fitz John Porter 1,430 17 84 1 0 user votes
Gen Fitz John Porter 2 0 0 0 0 user votes
Fitz John Portersome 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.