I recently visited the Winterthur Museum & Country Estate in Winterthur, Delaware. In addition to the 175 room mansion of the DuPont family, the Winterthur estate is also home to a major research library specializing on American culture. They have a very extensive collection of information on furniture-including Colonial, shaker, and Arts & Crafts furniture. It includes the third largest Shaker library in the country, and one of the best research collections on the Arts & Crafts movement in America. The library’s Arts & Crafts collection includes business papers from many companies, original periodicals, and glass-plate negatives.