This series contains autobiographical writings about Lettvin’s teaching activities, music essays, program notes, writings about music performance careers, and other miscellaneous writings. Materials are arranged by subject.

This series contains published writings, unpublished writings, tracings, and sketch books relating to published writings on relaxation, composers, musicality, and physical aspects of piano playing. Materials in this series are arranged alphabetically by subject.

This series contains materials written by Chasins, including his books, unpublished memoirs, radio scripts, and lecture notes. Materials are arranged by subject.

This series contains Hambourg’s manuscripts, published books and magazine articles on Chopin, Bach, Brahms, Schubert, and other composers, as well as on miscellaneous topics related to piano technique and musical interpretation. Materials are arranged alphabetically by composer. Articles and books not on a specific composer are arranged by subject.