Statistics for occurrence #1 of “Popular Creek” in entry united-states-of-america-montana of Harper's Encyclopedia of United States History:

...the Missouri, 3 miles above the mouth of the Yellowstone......1829 Steamboat Assiniboine, built by the American Fur Company, ascends the Missouri to Fort Union in 1833; winters near the mouth of Popular Creek ......1835 Father Peter John de Smet visits the Flathead Indians in Gallatin Valley......1840 De Smet establishes a mission on the St. Mary's River in the Bitter Root Valley......September, 18...
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Entity Corpus Doc Corpus Doc  
Popular Creek (Indiana, United States) 2 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.