Correspondence, 1977-95. Correspondents include Len Radic, Carillo Gantner, John Willett and Jean-Paul Delamotte. Copies of some of Hibberd's own letters are included (RESTRICTED) Box 34 (MS 6607) Unit ID: [unnumbered]
Correspondence, 1990 re The life of Riley (letters RESTRICTED) Box 44 (MS 6607) Unit ID: [unnumbered]
Correspondence, 1992-93. The correspondents are David Williamson and Barry Humphries Unit ID: [unnumbered]
Correspondence and cuttings relating to the 'Performing arts in Australia' which was published in Meanjin 1/84 (letters RESTRICTED) Box 44 (MS 6607) Unit ID: [unnumbered]