Statistics for occurrence #1 of “Gulf of Bothnia” in chapter 5, page 297 of George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 2, 17th edition.:

...e of the Scandinavians, the jurisdiction of the Dutch was established. Such was the end of New Sweden, the colony that connects our country with Gustavus Adolphus and the nations that dwell on the Gulf of Bothnia . It maintained its distinct existence for a little more than seventeen years, and succeeded in establishing permanent plantations on the Delaware. The descendants of the colonists, in the course ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Gulf of Bothnia 6 2 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.