Statistics for occurrence #1 of “Acting-Ensigns, D. S. Thompson” in chapter 41 of Admiral David D. Porter, The Naval History of the Civil War.:

...g-Master's Mate, D. S. Ingersoil; Engineers: Acting-Second-Assistant, Wm. T. Graff; Acting-Third-Assistants, L. L. Copeland and J. C. Garner. Acting-Masters, John B. Studley and T. W. Dodge; Acting-Ensigns, D. S. Thompson and E. N. Ryder; Acting-Assistant-Surgeon, Robert Cowie; Acting-Assistant-Paymaster, George W. Stone; Engineers: Acting-Second-Assistant, James Patterson; Acting-Third-Assistant, Wm. D. Butts. ...
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