Sentence:  The resultant town , platted in 1847 and named for the patron of Father Galtier 's mission , St. Paul , was to become an important center of the fur trade and was to take on a new interest for those Selkirkers who remained at <WSD>Red</WSD> River . 
Meaning of the word marked with <WSD> tags:  a tributary of the Mississippi River that flows eastward from Texas along the southern boundary of Oklahoma and through Louisiana