Statistics for occurrence #1 of “Pearl River” in entry indians-american of Harper's Encyclopedia of United States History:

...aimed to be more ancient than the surrounding people. The Natchez occupied a territory on the eastern side of the Mississippi, extending northeastward from the site of the city of Natchez along the Pearl River to the head-waters of the Chickasaw. They claimed to be older than the Uchees, and, like others of the Gulf region, they worshipped the sun and fire, and made sacrifices to the source of terrestria...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Pearl River (Mississippi, United States) 8 0 0 0 0 user votes
Pearl River (Louisiana, United States) 4 0 0 0 0 user votes
Pearl River (Missouri, United States) 0 0 0 0 0 user votes
Pearl River (New York, 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.