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

...eir ammunition. Six were ordered thereafter to cross the bar at Southwest Pass and proceed to the rear of Fort Jackson, holding themselves in readiness for any service. At midnight of the 28th, General Duncan sent an officer on board the Harriet Lane to inform Commander Porter of his willingness to capitulate. On the following day Commander Porter with nine gun-boats, proceeded up river to Fort Jackso...
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