Statistics for occurrence #1 of “Confederate States” in chapter 1.1 of Southern Historical Society Papers, Volume 19.:

...onstructed in accordance with the plan herein set forth, furnished by me on the 23rd day of June, 1861, to the Honorable S. R. Mallory, Secretary of the Navy, to William P. Williamson, Chief-Engineer Confederate States Navy, and John L. Porter, Constructor Confederate States Navy, the two latter having been directed by the Honorable Secretary of the Navy, in conjunction with myself, to devise an iron-clad vessel. ...
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