Statistics for occurrence #1 of “H. P. Gray” in chapter 51 of Admiral David D. Porter, The Naval History of the Civil War.:

...stants, Harvey Brown and F. T. Clark. Acting-Ensigns, S. G. Sluyter and D. Stevens; Acting-Master's Mates, J. Roffenterg and C. H. McClellan; Engineers: Acting-Third-Assistants, G. H. Parks, H. P. Gray and John Gordon. Acting-Ensign, James H. Jackson; Acting-Master's Mates, H. L. R. Woods and John Shields; Engineers: Acting-Second Assistant, L. B. Leland; Acting-Third-Assistant, H. C. Marr...
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