Statistics for occurrence #1 of “Colonel D. C. McCallum” in chapter 14 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.:
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† 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.