Statistics for occurrence #1 of “Com. John K. Mitchell” in chapter 18 of Admiral David D. Porter, The Naval History of the Civil War.:

...rocure; heavy tugs and merchant vessels were converted with some success, until a fleet of eighteen vessels, including the ram Manassas, and the iron-clad Louisiana, was gathered under the command of Com. John K. Mitchell , of the Confederate Navy. This fleet was composed of two divisions, one belonging to the regularly organized Navy and the other forming what was called the River Defense, under the immediate comm...
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