Sect. 1. The Composer as Theorist and Protomusicologist: "Tradition and Experiment in (the New) Music" Pt. I. Treatise on Musical Composition. Pt. II. Manual of Dissonant Counterpoint -- Sect. 2. The Musicologist as Theorist: On the Way to "The End Is My Beginning" -- Sect. 3. Selected Occasional Papers: Thinking About America and About the Arts.