Figure 50 Jar or jug fragments with impressed marks, Benjamin DuVal Pottery, Richmond, Virginia, 1817–1818. Salt-glazed stoneware. (Photo, Robert Hunter.) These marks may have been used by James DuVal when he took over his father’s stoneware manufactory in 1817. The full impressed mark might have read “duval stoneware manufactory/ richmond va.,” but no intact vessel with this mark has been found.