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

... Norfolk had fallen, and the brave Tattnall sought to save the Virginia by taking her up the James—success depending upon her stability when lightened to a draft of eighteen feet. He applied to Constructor Porter for information. In Flag-officer Tattnall's triumphant defence will be found this statement [see Scharf's Confederate States Navy, p. 235]: To the constructor, Mr. Porter, I applied through...
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