Statistics for occurrence #1 of “St. John's river” in chapter 39, page 521 of The Annals of the Civil War Written by Leading Participants North and South:

... of the water not great, no lives were lost. In 1863-4, Jacksonville, Florida, having been evacuated by the Confederates, then too weak to hold it longer, the Federal gunboats frequently ran up the St. John's river many miles, committing depredations along its banks. To stop these proceedings, I sent a party from Charleston under a staff officer, Captain Pliny Bryan, to plant torpedoes in the channels of, tha...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
St. John's River (Missouri, United States) 5 0 3 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.