Figure 2 Dishes, Burslem, ca. 1690. Slipware. (Left) D. 13 1/4 ". (Courtesy, Potteries Museum & Art Gallery; photo, David Barker.) These badly warped slipware dishes, recovered from a waste pit in Burslem, are one of the most common types of vessel produced at this time. Almost ninety dishes were found on this site. Very similar dishes have been found at Port Royal, Jamaica, where they were lost during the devastating earthquake of 1692.