Statistics for occurrence #1 of “Acting-Assistant Surgeon, Passmore Tread” in chapter 36 of Admiral David D. Porter, The Naval History of the Civil War.:

...-Volunteer-Lieutenant, Jas. P. Couthouy; Acting-Masters, J. W. Balch and E. A. Howell; Acting-Ensigns, J. S. Williams and E. T. Manter; Acting-Master's Mates, E. Morse, E. L. Bourne and E. M. Clarke; Acting-Assistant Surgeon, Passmore Tread -well; Acting-Assistant Paymaster, T. Q. Hill; Engineers: Acting-First-Assistant, G. M. Bennett; Second-Assistant, W. W. Shipman; Acting-Second-Assistant, Samuel Lemmon; Acting-Third-Assistants, J. H....
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