Correspondence between both Ashworth and the Executive Committee to Ove Arup and MacDonald Wagner and Priddle from February 1959 - June 1966. This includes a press cutting and report from Ove Arup
Correspondence between the contractors Civil and Civic and engineers, MacDonald Wagner and Priddle and court report of Arbitration hearing between these organisations, 1960-1962 Date: 1960/1962
Correspondence, (December 1965 to February 1967) including letter from Minister for Public Works to Chairman, expressing confidence, Restaurant Sub-committee with floor plan of restaurant, from Premier (Askin) to Chairman re survey by T.E. Bean and other matters, from T.E. Bean and the ABC, acoustics and redesign of main hall
Correspondence, February 1957 - June 1964, between Ashworth and, among others, Eero Saarinsen, the Premier, Union Internationale des Architects, Bernard Heinze
Correspondence, February 1964 to March 1965 from the Director of Public Works to and from Ashworth, Utzon and the Executive Committee
Correspondence from Ashworth and from Utzon to Executive Committee, November, 1962; from Ove Arup, Rider Hunt and MacDonald Wagner Priddle re finance; from Executive Officer to Ashworth
Correspondence from Ashworth, Ove Arup, MacDonald, Wagner and Priddle, Sydney County Council, Utzon and Rider Hunt, (April 1958 to September 1959) Date: (April 1958 to September 1959)
Correspondence: From Musica Viva re representation on Executive Committee and by Ashworth with price list for 'pictures' i.e. paintings of Emerson Curtis, May - November 1964 Date: May - November 1964