Statistics for occurrence #1 of “State of Virginia” in chapter 13 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.:

...he services of a competent military engineer were secured to plan and superintend the work. Thus it happened that, when the Ordinance of Secession was passed by the Constitutional convention of the State of Virginia , on the 16th of April, 1861, in answer to Lincoln's call for her quota of the seventy-five thousand troops, no time was lost in organizing a State corps of engineers to prepare defenses against the t...
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