Statistics for occurrence #1 of “Port Royal” in chapter 8 of Admiral David D. Porter, The Naval History of the Civil War.:

... any attempt of the enemy to plant batteries within range of the gunboats, whose farreaching shells committed some havoc among them on this occasion; nor did they ever attempt to obtain a lodgment on Port Royal Island, which remained in possession of the government during the war. A reconnoissance up the Tybee River was made by Captain C. H. Davis and Commander C. R. P. Rodgers with the Ottawa, Seneca, ...
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.