Statistics for occurrence #1 of “Pennsylvania” in article 11 of The Daily Dispatch: April 6, 1861., [Electronic resource]:

...nd owners and others in the counties of Western New York — especially in Erie, Chautauqua and Niagara — on account of the discovery of the deposit of oil in some localities, like those in Pennsylvania , Virginia and Ohio, and the indications are that these underground oleaginous deposits exist all through that region of country. Extensive preparations are making to bore for oil and secure it if f...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Pennsylvania (Pennsylvania, United States) 12,690 4 2 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.