Statistics for occurrence #1 of “J. H. Porter” in chapter 41 of Admiral David D. Porter, The Naval History of the Civil War.:

...ssistants, Timothy Flanders, Thomas McNellis and G. C. Rogers. Lieutenant, R. H. Lamson; Acting-Assistant Surgeon, Edgar S. Smith; Acting-Assistant Paymaster, R. M. Gillette; Acting-Ensigns, J. H. Porter , Wm. Hunter, J. B. Henderson and Henry Waring; Engineers: Acting-Second-Assistant, Fred'k Snyder; Acting-Third-Assistants, Edw. Aspald, C. M. Goodwin, J. T. Earl and E. A. Reilly. Acting-Vol...
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