By Leslie B. Grigsby. Originally published in June 1999. The Longridge Collection of ceramics is English pottery Valhalla. Nestled in a New England house with rare English and Continental treen, medieval ivory and metalwork, and early furniture and carvings, this extraordinary collection of ceramics can be divided into two main groups: about 440 pieces of tinglazed earthenware (delftware) and 100 …