dots, carefully painted in blue, later in puce, used from about 1782. 5, 6 - Ditto, less carefully painted in red. 7, 8, 9, 10 - Later Duesbury Marks, generally in red. 11 - Duesbury & Kean, seldom used, circa 1795 to 1809. 12, 13, 14, 15 - Bloor Marks, commence 1811 to 1849. 16, 17, 18, 19 - Quasi Oriental Marks used on several occasions in matching, and to use up seconds stock by Bloor. No. 17 is an imitation of the Sèvres mark. 20 - Dresden Mark, often used on figures. 21 - Derby Mark, supposed to have been used by Holdship when at Derby, about 1766. Rare. 22 - Stephenson & Hancock, King Street Factory, 1862, same mark used afterwards by Sampson Hancock, and now in use, 1897. 23 - Mark used by the Derby Crown Porcelain Co., Osmaston Road, from its establishment in 1877 to Dec., 1889. 24 - This Mark adopted by the above Co. when Her Majesty granted the use of the prefix "Royal" on 3 January 1890. Royal Crown Derby Visitor Centre The Royal Crown Derby Visitor Centre in Derby features a museum of porcelain items, and offers tours of the factory, a gift shop and a restaurant. See also John Haslem (1808–1884), an apprentice china painter at the factory from 1822, and said to be one of the best flower artists at the works. He also wrote a history entitled "The Old Derby China Factory" (George Bell, 1876). Georg Holtzendorff, a German painter who made the studies for the Gladstone Dessert Service. References Honey, W.B., Old English Porcelain, 1977 (3rd edn.), Faber and Faber, Further reading Barret, Franklin A[llen], and A.L. Thorpe. Derby Porcelain (London) 1971. Bradley, Gilbert, Judith Anderson, and Robin Barkla. Derby Porcelain, 1750-1798 (Heneage) 1992. Gilbert Bradley edited a Derby Porcelain International Society Newsletter, c. 1985–95. Bradshaw, P., Derby Porcelain Figures 1750-1848 (London: Faber Monographs), 1990. John W, William Billingsley 1758-1828 1968. Murdoch, J. and J. Twitchett. Painters and the Derby China Works 1987. Rice, Dennis. Derby Porcelain: The Golden Years 1750-1770 1983. Sargeant, M, Royal Crown Derby (Princes Risborough), 2000. Twitchett, John, Derby Porcelain (London: Antique Collectors' Guide), (1980), 2006. Twitchett John and Henry Sandon. Landscapes on Derby and Worcester Porcelain 1984. Twitchett, John and B. Bailey, Royal Crown Derby 1988. External links - Official website - History of Royal Crown Derby Co Ltd, from "British Potters and