After graduating from Worcester Central School in New York, Marilyn Dufresne worked in banking and later for the US Postal Service. She has been vice president of Worcester Historical Society; an officer and trustee of Worcester Free Library; president, treasurer and superintendent of Maple Grove Cemetery; the town of Worcester historian; past editor of Tri-Valley News; and a member of the New York State Historical Association. Marilyn's hobbies of collecting vintage postcards, photography and writing have inspired four books: Tri Valley Cobleskill to Colliersville, Delaware and Hudson Railway, Vintage Postcards of Otsego County and the latest Tri Valley Through Time.