Statistics for occurrence #1 of “General 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.:

...ommunication, and the result was a benefit to the roads and the Government. The construction corps of the United States Military Railroads had a comparatively easy time at City Point under General McCallum . There was plenty of hard work, but it was not under fire, and so expert had they become that the laying of track and repairing of bridges was figured merely as a sort of game against time. The h...
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