Question: In what mountain range does the river originate which serves as the backdrop for Wilderstein, a 19th-century Queen-Anne-style country house located in Rhinebeck, Dutchess County, New York, United States?
Sentence (from "Little Nine Partners Patent"): Roughly triangular in shape, it was bounded on the north by Columbia County, on the south by the Great Nine Partners Patent (1697) and on the west by the Schuyler (1686) and Rhinebeck (1697) patents. Its eastern boundary was the area known as The Oblong, a narrow strip of land along the eastern edge of Dutchess County, bordering the state of Connecticut.
Relevant evidence: No