[35] The salt-glazed ware of Europe seems to be the only important exception to this perhaps rather sweeping generalisation. [36] It is possible, however, that some of the various tints of brown used from early Ming times, especially that known to the Chinese as ‘old gold,’ may have been suggested by this copper lustre. The ground on which this lustre is superimposed in some old Persian wares is of a very similar shade. Dr. Bushell mentions a tradition that the old potters tried to produce a yellow colour by adding metallic gold to their glaze, but that the gold all disappeared in the heat of the _grand feu_. They had therefore to fall back upon the _or bruni_. [37] Consult for this ware the beautifully illustrated monographs of Mr. Henry Wallis on early Persian ceramics. [38] The cobalt pigment itself, when not of native origin, was known to the Chinese in Ming times as _Hui-hui ch’ing_ or ‘Mohammedan blue.’ The other names for the material, _sunipo_ and _sumali_, probably point in the same direction. [39] A little white oval vase, in the Treasury of St. Mark’s, at Venice, may possibly be of this old Ting ware. The decoration is in low relief, and four little rings for suspension surround the mouth. In any case this is the only piece in this famous collection that has any claim to be classed as porcelain. [40] The style of this _cloisonné_ decoration is almost identical with that seen in the two magnificent lacquer screens with landscapes and Buddhist emblems at South Kensington. The chains of pearls and _pendeloques_ are characteristic of a style of painting often found on the beams and ceilings of the old Buddhist temples of Japan. This is, I think, a _motif_ not found elsewhere on Chinese porcelain. [41] The late M. Du Sartel gives in his work on Chinese porcelain good photographs of some jars of this class in his collection. He was one of the first to call attention to this ware. [42] This dull surface is especially noticeable in some of the specimens with Arabic inscriptions in the British Museum; these date from the Cheng-te period (1505-21). [43] In Persia, too, and in that country accompanied by many other varieties of Chinese porcelain. For examples of these wares see above all the collection at South Kensington. [44] _Relations des Musulmans avec les Chinois._ It is not impossible, however, that further research may bring to light some information on this subject. Since writing this I hear from Dr. Bushell that some specimens of Saracenic enamelled glass, presumably of the fourteenth century, have lately been purchased in Pekin. The Arab trade with China was probably never more active than in the first half of the fifteenth century. It is with the Memlook Sultans, then ruling a wide empire from Cairo, that we must associate most of this enamelled glass, and the Eastern trade was in their hands. [45] See Bushell, p. 454.