Statistics for occurrence #1 of “Roanoke River” in chapter 41 of Admiral David D. Porter, The Naval History of the Civil War.:

... of the sounds of North Carolina. Information received from time to time places it beyond doubt that the rebels are constructing, and have almost completed, at Edward's Ferry, near Weldon, on the Roanoke River , a ram and an ironclad floating battery. It is reported that these vessels will be completed in the course of five or six weeks. It is further reported that an attack on Plymouth is contemplated by...
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