sentences:  The oldest piece of the Selkirk Subdivision is that northwest of Hoffmans, opened in 1836 by the Utica and Schenectady Railroad.The Saratoga and Hudson River Railroad opened in 1866 from Schenectady to Athens, including the current Selkirk Subdivision between Unionville (near Selkirk Yard) and Fullers.The line from Fullers northwest to near Pattersonville opened in 1884 as part of the New York, West Shore and Buffalo Railway.