Philip D. Zimmerman is a museum and decorative arts consultant based in Lancaster, Pennsylvania. A prolific author, teacher, and lecturer, Zimmerman is a nationally recognized authority on early American furniture. His publications include Harmony in Wood: Furniture of the Harmony Society, Delaware Clocks, American Federal Furniture and Decorative Arts from the Watson Collection, and numerous essays and articles in books and periodi­cals such as American Furniture, The Magazine Antiques, and Winterthur Portfolio. Before forming his consulting business, Zimmerman was director of the museum collections division at Winterthur, exec­utive director of the Historical Society of York County, and curator of the Currier Museum of Art, Manchester, NH.