Statistics for occurrence #1 of “Pennsylvania” in chapter 6 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.:
...town, about a mile south of the District line, and entering and leaving the town were other important roads.
As this was on fairly high ground it was selected as a proper point for a work, and Fort Pennsylvania (afterward Fort Reno) was placed there.
Thus was established one point of the line of works.
Fort Stevens, commanding the Seventh Street Road, running north, and Fort Lincoln, commanding the Balt...
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