xiv TRANSLATOR'S PREFACE P. and D. Colnaghi, he has added particulars of certain pictures occurring at the sales of the past season (1907) in London and Paris. Moreover, through the kindness of Mr. Edward Robinson and Mr. Roger Fry, he has been enabled to add descriptions of pictures in the Metropolitan Museum of Art, New York. He has also introduced many cross-references which will, it is hoped, facilitate the use of the Catalogue. The German version of the section devoted to Jan Steen's works contains a lengthy appendix of corrections and additions made while the earlier sheets were passing through the press ; these, together with similar but less numerous corrections in the other sections, have all been incorporated in their proper places in the English text. These various slight changes and emendations have entailed a considerable amount of labour beyond that of the mere translation ; but it seemed desirable that such a masterpiece of scholarly research as Dr. Hofstede de Groot's new edition of Smith's " Catalogue Raisonne " should appear before the English public in as complete a form as possible. EDWARD G. HAWKE.
