Statistics for occurrence #1 of “Commander D. D. Porter” in part 2.11, chapter 1.11 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 2: Two Years of Grim War.:

... Commander D. D. Porter
The Second, Fourth, and Sixth Massachusetts Light Artillery at Baton Rouge, in May, 1862, photographed ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Commander D. D. Porter 28 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.