Ligeti, Gyorgy. (1923–2006) Autograph Musical Manuscript of an Unpublished Composition for OrchestraAutograph musical sketch from an apparently unpublished work for orchestra by the important avant garde composer. According to the accompanying photocopied letter from the composer dated December 21, 1963, the manuscript is the opening pages of a 1958 orchestra work, which he decided not to continue. The verso of the third sheet, however, bears the title in his hand "Apparitions II," and indeed some of the material in the preceding pages is highly