Correspondence of Ashworth and Rider Hunt with Ove Arup, Utzon, members of the Technical Advisory Panel and from organ builders, February to April 1962 Date: February to April 1962
Correspondence of Ashworth, Utzon, Skipper Neilson, Rider Hunt, A.R. Meyer, Ove Arup and Unrah, May - October, 1962 Date: May - October, 1962
Correspondence of the Sydney Opera House Executive Committee, including letters from, and to, Jørn Utzon, NRMA and Sydney Opera House Appeal Fund
Correspondence relating to meetings of the Technical Advisory Panel of the Sydney Opera House Executive Committee. Includes letter from Jørn Utzon, a questionnaire and minutes of meetings
Correspondence re paintings by R. Emerson Curtis, October 1964; from Utzon to Duek-Cohen, September 1968 and to the Minister re budget for Stage III