Statistics for occurrence #1 of “Port Royal” in chapter 37 of Admiral David D. Porter, The Naval History of the Civil War.:

...and note the rapidity with which DuPont's squadron captured the works at Hilton Head, etc., in comparison with the long-drawn-out battle at Alexandria against forts only a trifle superior to those at Port Royal . and the palm will be given to the American squadron as an exhibition of skill. That affair did a great deal to impress foreign Governments with the power of our guns, and the indomitable energy ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Port Royal (South Carolina, United States) 2,928 130 170 6 0 user votes
Port Royal (Jamaica) 4 0 4 0 0 user votes
Port Royal (Georgia, United States) 2 0 0 0 0 user votes
Port Royal (Alabama, United States) 0 0 0 0 0 user votes
Port Royal (Florida, United States) 0 0 0 0 0 user votes
Port Royal (Kentucky, United States) 0 0 0 0 0 user votes
Port Royal (Pennsylvania, United States) 0 0 0 0 0 user votes
Port Royal (Pennsylvania, United States) 0 0 0 0 0 user votes
Port Royal (Tennessee, United States) 0 0 0 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.