THE PREPARATION of this volume has been generously assisted by everyone to whom we applied for help--Dr. Pavel Lamm in Moscow, Dr. Avrahm Yarmolinsky at the New York Public Library, Dr. Michael Karpovich, Dr. Alfred Einstein, Mr. Alfred J. Swan, and Miss Gladys Caldwell and the staff of the Music Department at the Los Angeles Public Library. The University of California at Los Angeles and the Library of Congress made it possible for us to consult books and periodicals locally unavailable. Mr. Alfred Frankenstein has broken into his unique collection of Musorgskiana to aid our illustrations, and Mrs. Sina Fosdick of the American Russian Cultural Association established our contact with Mrs. Nicholas Roerich in India. The most onerous task was cheerfully assumed by Mr. Ben Maddow and Dr. Paul Lang, who read the first translation and editing of the documents, and brought to them a great deal of their present order and sense.
J. L. and S. B.