Statistics for occurrence #1 of “Rear-Admiral DuPont” in chapter 37 of Admiral David D. Porter, The Naval History of the Civil War.:

...report torpedo-boat. attempts to destroy New Ironsides. praise of Dahlgren and officers. the monitors and New Ironsides contrasted. Boynton's criticisms, etc. Rear-Admiral Dahlgren succeeded Rear-Admiral DuPont , at Port Royal, on July 4th, 1863, the latter having been relieved at his own request, owing to a difference of opinion between himself and the Secretary of the Navy in regard to the operations befor...
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