Martin Iddon is Professor of Music and Aesthetics at the University of Leeds. His musicological research largely focusses on post-war music in Germany and the United States of America and his books New Music at Darmstadt (Cambridge, 2013) and John Cage and David Tudor (Cambridge, 2013).

Introduction; 1. John Cage to Peter Yates, undated [1940?]; 2. John Cage to Peter Yates, 1940; 3. John Cage to Peter Yates, 1941; 4. John Cage to Peter Yates, 1941; John Cage, 'Organized Sound' draft, 1941; Peter Yates, 'Organized Sound,' California Arts and Architecture (1941); 5. John Cage to Peter Yates, undated [1941]; 6. John Cage to Peter Yates, undated [ca. 1947]; 7. John Cage to Peter Yates, undated [ca. 1947]; 8. John Cage to Peter Yates, undated [ca. September 1948]; Peter Yates, 'Music,' Arts and Architecture (1948); 9. John Cage to Peter Yates, undated [ca. 1948; Peter Yates, 'Music,' Arts and Architecture (1948); Peter Yates, 'Music,' Arts and Architecture (1948); 10. John Cage to Peter Yates, undated [ca. 1948]; 11. John Cage to Peter Yates, undated [ca. 1948]; 12. John Cage to Peter Yates, undated [early 1949]; Peter Yates, 'Music,' Arts and Architecture (1949); 13. Peter Yates to John Cage, 1953; Peter Yates, 'Music,' Arts and Architecture (1953); 14. John Cage to Peter Yates, 1953; 15. Peter Yates to John Cage, 1953; Peter Yates, 'Pierre Boulez,' Arts and Architecture (1957); Peter Yates, 'A Collage of American Composers - Part 3,' Arts and Architecture (1959); Peter Yates, 'A Collage of American Composers - Part 4,' Arts and Architecture (1959); 16. Peter Yates to John Cage, 1959; 17. John Cage to Peter Yates, 1959; 18. Peter Yates to John Cage, 1959; 19. Peter Yates to John Cage, 1959; Peter Yates, 'Virgil Thomson and Horatio Parker,' Arts and Architecture (1959); 20. Peter Yates to John Cage, 1959; 21. Peter Yates to John Cage, 1959; 22. John Cage to Peter Yates, 1959; 23. Peter Yates to John Cage, 1960; 24. Peter Yates to John Cage, 1960; 25. John Cage to Peter Yates, undated [ca. 1960]; Peter Yates, 'Two Albums by John Cage - Part 1,' Arts and Architecture (1960); 26. Peter Yates to John Cage, 1960; 27. John Cage to Peter Yates, 1960; 28. Peter Yates to John Cage, 1960; Peter Yates, 'Two Albums by John Cage - Part 2,' Arts and Architecture (1960); 29. John Cage to Peter Yates, 1960; 30. Peter Yates to John Cage, 1960; 31. John Cage to Peter Yates, 1960; 32. Peter Yates to John Cage, 1960; 33. Peter Yates to John Cage, 1960; 34. John Cage to Peter Yates, 1960; 35. Peter Yates to John Cage, 1960; 36. John Cage to Peter Yates, 1960; 37. John Cage to Peter Yates, 1960; 38. Peter Yates to John Cage, 1960; 39. John Cage to Peter Yates, 1960; Peter Yates, 'Monday Mad on Tuesday,' Arts and Architecture (1960); Peter Yates, 'Music,' Arts and Architecture (1960); 40. John Cage to Peter Yates, 1961; 41. Peter Yates to John Cage, 1961; Peter Yates, 'American Experimental Tradition,' unpublished manuscript [ca. 1961]; 42. John Cage to Peter Yates, 1961; 43. John Cage to Peter Yates, 1961; 44. John Cage to Peter Yates, undated [1961]; 45. John Cage to Peter Yates, 1961; 46. John Cage to Peter Yates, 1961; 47. Peter Yates to John Cage, 1961; 48. John Cage to Peter Yates, 1961; 49. Peter Yates to John Cage, 1961; Peter Yates and John Whitney, 'Notes for Music,' unpublished manuscript [1961]; Peter Yates, 'Sound,' manuscript [1961]; 50. John Cage to Peter Yates, 1961; 51. Peter Yates to John Cage, 1961; 52. Peter Yates to John Cage, 1961; Peter Yates, 'A Lost Center,' manuscript [1961]; 53. John Cage to Peter Yates, 1961; 54. John Cage to Peter Yates, 1961; Peter Yates, 'A General Report,' Arts and Architecture (1962); 55. John Cage to Peter Yates, 1962; 56. John Cage to Peter Yates, 1962; Peter Yates, 'Silence by John Cage,' Arts and Architecture (1962); Peter Yates, review of John Cage, Silence, Notes: the Quarterly Journal of the Music Library Association (1962); Peter Yates, 'More Than Time,' Arts and Architecture (1962); Peter Yates, 'John Cage's Weekend in Los Angeles,' Arts and Architecture (1962); 57. John Cage to Frances and Peter Yates, 1962; Peter Yates, 'The American Artist,' manuscript written for the