Statistics for occurrence #1 of “Ferdinand C. Duvall” in chapter 9 of Brig.-Gen. Bradley T. Johnson, Confederate Military History, a library of Confederate States Military History: Volume 2.1, Maryland:

... in recruiting new companies were Captains Herbert, Goldsborough, Lieutenant George Thomas, Corporal Clapham Murray, Private W. P. Zollinger, late of the First Maryland, and Captains J. Parran Crane, Ferdinand C. Duvall , Jos. L. McAleer, John W. Torsch, Gwynn and Stewart, who were generally new men, except Torsch, who had commanded a company in a Virginia regiment for the preceding year. The regiment was organized...
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