Statistics for occurrence #1 of “Colonel D. E. McCallum” in page 144 of Benson J. Lossing, Pictorial Field Book of the Civil War. Volume 3.:

...communications between Nashville and Bridgeport. These troops were moved with marvelous celerity under the wise direction of General Meigs, the Quartermaster-General, and the skillful management of Colonel D. E. McCallum , the Government Superintendent of railways, and W. Prescott Smith, Master of Transportation on the Baltimore and Ohio road. In the space of eight days, the two corps, twenty thousand strong, marche...
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