But Krog's genius was too original to snatch at the body; he caught the spirit of the best, and the first attempts have a slight indication of their origin, till with full strength Copenhagen needed no guiding hand to lead her to the inspiration of all true design. The simple forms of nature were translated into ceramic art, and the melting, dreamy, sad-hued porcelain was imbued with the subtle effects of the Danish landscape. The great simplicity of _motif_ was the great simplicity of genius. The effects are so natural and reticent that their greatness might well escape common observation. But the trained eyes of half the potters in Europe and of connoisseurs of the highest ceramic art were turned, and are turned still, to the output of the Copenhagen factory. _Summa ars est celare artem_ is eminently applicable to the art of Arnold Krog and the band of Danish artists trained under him. There is nothing showy or clever, nothing cheap or meretricious in all their work. Everything that has come from Krog's hands has been well conceived, and an honest attempt made not to win admiration but to make one step forward in artistic evolution towards the ideal. Without seeking reward he has won the esteem of the cultured critics of a whole continent. =The Idiosyncrasies of Copenhagen.=--Wherein lies the strength of Copenhagen porcelain? The mysteries of underglaze did not originate in Denmark. The blue, greenish-yellow, brown, sea-green, maroon, lemon-colour, celadon-green, and red, are colours found painted under the glaze in old Chinese examples in collections in various European museums. But there is a difference. Chinese landscapes in blue have a charm and atmosphere of their own, although the European taste has shown a marked preference for enamel-painted porcelain of more brilliant colours. The underglaze of the East was mainly confined to decorative conventional treatment. There is the exquisite family of jars, designed as presents at the New Year, painted underglaze, with the prunus blossom, and geometric pattern representing the breaking ice. These are grotesquely termed "ginger jars" in the jargon of the auction-room, and fine specimens bring immense prices under the hammer. In a measure these, and vases and beakers with floral decoration, and cups and saucers, with dragons or with the well-known "aster" pattern, may be regarded as conventional. From these prototypes Meissen and Sèvres and Worcester drew many fine inspirations.