Statistics for occurrence #1 of “Lieutenant D. D. Porter” in chapter 47 of Admiral David D. Porter, The Naval History of the Civil War.:

... from her peak. Having received his sailing orders, Semmes dropped down to the forts preparatory to getting to sea past the blockading vessels at the mouths of the Mississippi — the Powhatan. Lieutenant D. D. Porter , at Southwest Pass, and the Brooklyn, Commander Charles H. Poor, at Pass à l'outre. Semmes' sailing orders were brief and to the purpose. He was to burn, sink and destroy. within the lim...
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