Statistics for occurrence #1 of “Hatteras Island” in chapter 5 of Admiral David D. Porter, The Naval History of the Civil War.:

...ut.-Commanding Crosby. They carried about 900 troops under command of Major-General B. F. Butler. On the 27th of August, 1861, the day after leaving Hampton Roads, the squadron anchored off Hatteras Island , on the extreme southwestern point of which were Forts Hatteras and Clark, separated by a shallow bay, half a mile wide. Of these works Fort Hatteras was the larger, and together they mounted twent...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Hatteras Island (North Carolina, United States) 55 4 1 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.