Statistics for occurrence #1 of “Mississippi River” in chapter 30 of Admiral David D. Porter, The Naval History of the Civil War.:

...e their way carefully along, keeping a good lookout ahead. Suddenly the Manitou and Rattler came upon a very large steamer, the finest of those now remaining afloat, which had been the pride of the Mississippi River before the war. This was the Louisville, afterwards converted into a war-vessel carrying fifty guns. Selfridge's other two vessels about the same time captured the steamer Elmira, loaded with sto...
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