Statistics for occurrence #1 of “Colonel Magruder” in chapter 5 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.:

...f old 4-pounder iron guns belonging to the State of Virginia to get a good bore, and then rifle them after the manner of the Parrott. Besides these, that State purchased a few Parrott guns, used by Colonel Magruder at Big Bethel, in June, 1861. Of the volunteer associations, the Washington Artillery, of New Orleans, organized in 1838, and having seen service as Company A in Persifal Smith's regiment in the ...
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