Japanese collector (PL. II.).[41] The colours applied _under the glaze_ are confined to cobalt blue and copper red. The latter when fine in tint was greatly prized by the Chinese, and we are informed that in the most brilliant specimens the colour was given by ‘powdered rubies from the West.’ It was, however, a treacherous colour to use, and after the period of Hsuan-te (1425-1435), which was famous for its ruby-red, [Illustration: _PLATE V._ CHINESE] it fell into comparative disuse and was displaced in a measure at a later date by a more manageable iron red. The use of the copper sub-oxide to obtain a red, _sous couverte_, was, however, revived in the time of Kang-he. On examples in European collections this red, when used alone or in connection with blue, is generally of a rather poor maroon colour, and it has not found much favour with us. The colour was often thus applied to the painting of fish, floating, it may be, among blue water-weeds. We see it at its best as a monochrome on some little bowls, enlivened with a floral design in gold, in the British Museum. These cups and some similar ones at Dresden undoubtedly date from Ming times; the ruby tint seen through a brilliant glaze has never been equalled in later days. With these we may compare certain little apple-green bowls similarly decorated with gold. One of these in a silver-gilt mounting of the early sixteenth century is in the Gold Room at the British Museum (PL. V.). ‘BLUE AND WHITE’ PORCELAIN. What we somewhat vaguely call ‘blue and white,’ that is porcelain decorated under the glaze with designs painted with cobalt blue, has always formed the most important class in the eyes of European collectors, at least of those of England and Holland. This preference has been even more marked with the people of India and Persia, and no wonder, for no combination of colour more suggestive of coolness could be imagined. It has thus come about that this class of ware, more than any other, has been made with the direct object of exportation. This blue and white porcelain of China and Japan, which has found its way into so many lands both of Europe and Asia, has for centuries had the profoundest influence upon the native wares of these countries, whether of porcelain or of fayence.