There is no doubt that the old blue-and-white porcelain of Copenhagen has not yet been exploited by collectors. It came concurrently with the rich overglaze painting in colours and the magnificence of gilding for which the Müller period is remarkable. It stands quite apart; its decoration is underglaze, and not at that time, nor since, has gold ever been added to this mussel-blue painted and fluted utilitarian ware other than in very exceptional circumstances. It is simple and delightful, and what it was in the old days it is now. The style of painted decoration is perennial. It is a pattern known all over the world. It has lived for a hundred and thirty-six years. Its life-history suggests the long-continued idealities of the Chinese potter or the coloured intricacies of the Persian rug-weaver continued by the wise children of clever craftsmen with equal fidelity from generation to generation. TABLE OF MARKS (Old Blue-and-white Porcelain Underglaze Painted) of Painters and Modellers, found usually in conjunction with the Factory Mark of the three blue lines. Painter's mark in blue. Modeller's mark incised. Mark found on examples of the Bornholm clay period, see _Apothecary Jar_ (illustrated, p. 161). [Illustration] On _Oval Dish_, fine body, and with scale pattern decoration in rich blue. =MII= (incised). (Illustrated, p. 169). [Illustration] _Coffee Pot_, Bornholm period, =ML= incised. (Illustrated, p. 161). [Illustration] On a _Soup Tureen_, marked at bottom of vessel inside. [Illustration] On a _Soup Tureen_, at bottom of vessel inside, =TI= on base (incised). [Illustration] Bornholm period mark. On a _Pounce Box_, _Cup_ with spout and handle, and other examples. [Illustration] On a _Plate_ with pierced edge (illustrated, p. 169). [Illustration] On a round _Inkstand_ Three lines and cross (in black). =K= (incised). [Illustration] On a _Pounce Box_, at Museum, Royal Copenhagen Manufactory. =L= (incised). [Illustration] On a round _Tea Caddy_, with floral decoration. =II= (incised). [Illustration] On a _Tea Caddy_. Inside rim (in blue). =T= on base (incised). [Illustration] On a _Small Teapot_. Moulded rosebud on lid. Figure 3 (in blue) on rim of lid. Other mark on base (in blue). (Illustrated, p. 167). [Illustration] On a _Compotier_ (in blue). At the Museum, Royal Copenhagen Porcelain Factory. [Illustration] Mark (in blue) on _Plate_ with pierced edge. [Illustration] On a _Soup Tureen and Cover_, with lemon and leaves modelled on cover, natural size. Figure 2 (incised). [Illustration] On a _Cup_, and other examples. [Illustration] On a _Plate_, at Museum, Royal Copenhagen Factory, and other examples. [Illustration] On _Cup_, of unusual decoration, with blue banded ornament. [Illustration] On a _Fruit Basket_, pierced work, twisted handles, and roses in relief. =W2= (incised). [Illustration] On a _Jug_ at the _Dansk Folke Museum_, Copenhagen. [Illustration]