Statistics for occurrence #1 of “Jno. F. O'Brien” in chapter 8 of Alfred Roman, The military operations of General Beauregard in the war between the states, 1861 to 1865:

...the interior, to throw over the parapet into the ditch of the water-face, under the direction of the Engineer Department, to form a chemise to the scarp. Very respectfully, your obedient servant, Jno. F. O'Brien , Major and A. A. G. Headquarters, Department S. C., Ga., and Fla., Charleston, S. C., Sept. 19th, 1863. Brig.-General R. S. Ripley, Comdg. First Mil. Dist., etc., etc.: General,—The Comma...
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