THE author would like to express his grateful thanks to colleagues and heads of institutions for their generous response to his requests for information and photographs and permission to reproduce illustrations. Their courtesy has been acknowledged in the Lists of Figures and Plates, as well as in the notes in a few special cases. The friendly co-operation of the officials of the Cairo Museum and the Egyptian Department of Antiquities has been of inestimable assistance over a period of many years. A Fulbright award, which made it possible to spend most of the year 1951 in Egypt, provided an invaluable opportunity to re-examine familiar things and to see much that was new and important. The author owes a particular debt to his own institution, the Museum of Fine Arts in Boston, and to the Metropolitan Museum of Art in New York for the privilege of drawing upon the records of the expeditions which they long maintained in the field. However, so much help and encouragement has been freely offered from all sides that it would be virtually impossible to list each individual source. Many of the ideas expressed here have evolved in the process of lecturing on Egyptian art in the Fine Arts Department of Harvard University since 1948. Special thanks are due to Miss Suzanne Chapman, Miss Mary B. Cairns, and Mr Nicholas Millet for their assistance in preparing the illustrations and text for the press and to the publishers for their willingness to have text figures especially drawn by Mr John Walkey.