58 pp. Rubbing and bumping to wraps, some creases, fine inside. Paul Sacher Foundation was begun in 1973 to preserve Sacher's music library. It has since expanded to encompass many more 20th- and 21st-century collections. A large flap on front wrap to with an illustration of a ms. leaf from Bela Bartok's Tanzsuite for Orchester (1923) in piano score. The Mitteilungen is issued yearly to ''report on new activities and developments.'' In this issue: Bestande der Paul Sacher Stiftung: Sammlungen; Neue Sammlungen 2000 (Sammlung Bela Bartok, Depositum Peter Bartok; Sammlung Gyorgy Ligeti Illustrated by a autograph ms. page from Le Grande macabre; Arthur Lourie, with illus., Rolf Urs Ringger, with illus frrom e tacean dolcemente; Andre Schaeffner, illus. autograph page from La Theatre imaginaire de Debussy ); Erganzungen bestehender Sammlungen(including Luciano Berio Pierre Boulez Adolf Busch, Elliott Carter, Antal Dorati, Henri Dutilleux, Guy Freedman, Hans Werner Henze, Gyorgy Kurtag, Witold Lutoslawski, Frank Martin, Aribert Reimann, George Rochberg, Igor Stravinsky, Robert Suter, Sandor Veress, Stefan Wolpe); Neuezugange einzelner Manuskripte(including Frederick Delius, Jim Grimm) . Beitrage: Felix Worner--''mit dem 3. das Stuck flott hinausschmeissen'' Zu Anton Weberns Korrecturen; Stephen Heinemann--Melodic Practice in Elliott Carter's Clarinet Concerto; Valeria Tsenova--Number and Proportion in the Music of Sofia Gubaidulina; David Beard--''From the Mechanical to the Magical'': Birtwistle's Pre-Compositional Plan for Carmen Arcadiae Mechanicae Perpetuum; Eun-Ha Kim--''Unfinished''--eine Geschichte geht nie zu Ende. Roman Haubenstock-Ramatis Credentials, or ''Think, Think Lucky''; Austen Clarkson--From Tendenzmusik to Abstract Expressionism: Stefan Wolpe's Battle Piece for Piano. Publikationen der Paul Sacher Stiftung: Neuerscheinungen 2000; Liste der Publikationen; Bibliographie.