Statistics for occurrence #1 of “Captain Thomas O'Hara” in article 15 of The Daily Dispatch: May 10, 1862., [Electronic resource]:

...ntested battle field. I beg to commend their names to the notice of the War Department, namely: of Captain H. P. Brewster and N. Wickliffe, of the Adjutant and Inspector General's Department. Captain Thomas O'Hara , Acting Inspector-General. Lieuts. Geo. Baylor and Thos. M. Jack, Adis-de-Camp. Volunteer Aide-de-camp, Colonel William Preston, Major D. M. Hayden, E. W. Munford, and Calhoun Benham. ...
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