Statistics for occurrence #1 of “Roanoke Island” in chapter 11 of Admiral David D. Porter, The Naval History of the Civil War.:

...amlico Sound, and therefore the first object of this expedition was to gain possession of Albemarle Sound and the connecting waters, through which the Confederates were carrying on an active trade. Roanoke Island barred the way between these two sounds, and the Confederates had made it a formidable barrier by the erection of heavy fortifications The channel connecting Pamlico and Albemarle Sounds in which...
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Roanoke Island (North Carolina, United States) 1,553 36 141 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.