Figure 15 Pitcher fragment, attributed to Sowter and Company, Mexborough, Yorkshire, ca. 1800–1807. Castleford-style white feldspathic stoneware. This pitcher fragment, which bears the Great Seal of the United States, was found behind a house at 113 South Royal Street, Alexandria. It may have been discarded by the owner of McKnight’s Tavern, William H. McKnight, who moved there in 1816. The pitcher has the same molded relief pattern as a black stoneware teapot attributed to Sowter and Company.