In the bibliographical list it has been impossible to distinguish the relative value of the books included. I think that _something_ of value may be found in nearly every one of these works, but in many, whatever there is of original information might be summed up in a few pages. In fact, the books really essential to the student are few in number. For Oriental china we have the Franks catalogue, M. Vogt’s little book, _La Porcelaine_, and above all the great work of Dr. Bushell, which is unfortunately not very accessible. For Continental porcelain there is no ‘up-to-date’ work in English, but the brief notes in the catalogue prepared shortly before his death by Sir A. W. Franks have the advantage of being absolutely trustworthy. The best account of German porcelain is perhaps to be found in Dr. Brinckmann’s bulky description of the Hamburg Museum, which deals, however, with many subjects besides porcelain, while for Sèvres we have the works of Garnier and Vogt. For English porcelain the literature is enormous, but there is little of importance that will not be found in Professor Church’s little handbook, or in the lately published works of Mr. Burton and Mr. Solon. The last edition of the guide to the collection lately at Jermyn Street has been well edited by Mr. Rudler, and contains much information on the technical side of the subject. On many historical points the notes in the last edition of Marryat are still invaluable: the quotations, however, require checking, and the original passages are often very difficult to unearth. In the course of this book I have touched upon several interesting problems which it would be impossible to thoroughly discuss in a general work of this kind. I take, however, the occasion of bringing one or two of these points to the notice of future investigators. Much light remains to be thrown upon the relations of the Chinese with the people of Western Asia during the Middle Ages. We want to know at what time and under what influences the Chinese began to decorate their porcelain, first with blue under the glaze, and afterwards by means of glazes of three or more colours, painted on the biscuit. The relation of this latter method of decoration to the true enamel-painting which succeeded it is still obscure. So again, to come to a later time, there is much difference of opinion as to the date of the first introduction of the _rouge d’or_, a very important point in the history and classification of Chinese porcelain. We are much in the dark as to the source of the porcelain exported both from China and Japan in the seventeenth century, especially of the roughly painted ‘blue and white,’ of which such vast quantities went to India and Persia. So of the Japanese ‘Kakiyemon,’ which had so much influence on our European wares, what was the origin of the curious design, and what was the relation of this ware to the now better known ‘Old Japan’?