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 supply now on hand in that fort. I am also directed to inform you that the enemy is constructing a battery in rear of the middle of Black Island. 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. 23d, 1863. Brig.-Genl. R. S. Ripley, Comdg. First Mil. Dist., etc., etc.: General,—The Command...
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