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PREFACE vii my action that I might have been deprived of their help, which is necessary for the compilation of the remaining volumes of the " genuine " catalogue. However useful the enlarged catalogue might be, this seemed too high a price to pay for it. In this volume Herr Kurt Freise has prepared the Adriaen van Ostade section for the press, while Dr. Kurt Erasmus has prepared the other sections. C. HOFSTEDE DE GROOT. 's GRAVENHAGE, February 1910.
