Statistics for occurrence #1 of “Acting-Master, James M. Williams” in chapter 41 of Admiral David D. Porter, The Naval History of the Civil War.:

... P. M. Topham; Engineers: Acting-First-Assistant, Cornelius Carr; Acting-Second-Assistants, B. F. Haines, F. V. Holt and Samuel Bolson; Acting-Third-Assistants, E. Minne and W. Y. Schneider. Acting-Master, James M. Williams ; Acting-Ensigns, Jos. Avant, C. J. Goodwin and C. W. Leekins; Acting-Master's Mates, John Aspinwall and W. H. Richmond; Acting-Assistant Surgeon, James Kinnier; Acting-Assistant Paymaster, Thos. Jern...
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