I would like to take the opportunity which a Preface affords to thank those friends who have helped me in the preparation of this little book. Most of them will find their names mentioned somewhere in the text. It is also my pleasant duty to heartily acknowledge the kindness I have everywhere experienced when collecting the materials on which these studies are based. On many occasions I have entered a museum in Britain or abroad, not knowing any one on the staff. On explaining my object every facility was at once offered, cases were opened, specimens were handed to me, and various conveniences arranged; often, too, help was rendered me at the time, not only by curators and assistants, but also by museum porters and gendarmes. It is particularly gratifying for a stranger to be received as a colleague, and to find that museum authorities everywhere recognise that the collections put under their charge serve their end best when they are utilised by students.

A word of apology may be needed for the copious extracts which have been made from the works of other writers. My object in this has been to show that there has been quite a considerable number of investigators who have approached the subject of decorative art from a similar point of view to that elaborated in the present essay. A quotation brings one more face to face with the author than does a mere abstract, and personally I like to feel the comradeship of similar studies. We all contribute our mites, and the only pity is we cannot all be personally known to one another.

It would afford me great pleasure if this book leads to new students entering upon this important and intensely interesting field of inquiry, and I shall always be pleased to correspond with those who are or who desire to be fellow-workers.

ALFRED C. HADDON.