What is our life?, composer Orlando Gibbons (Leipzig: Breitkopf & Hartel), n.d. Volume Hince 1 2675 Unit ID: 2675 Date: n.d.
What is private enterprise? Labor Club, University of Melbourne, 16 Aug. 1943 Box 50 (MS 2505) Unit ID: 550-560 Date: 16 Aug. 1943
'What is secularism' (lecture), 'Scientific thinking in rationalism' and 'Rationalism and philodophy', 1977 Box 22 Unit ID: 12 Date: 1977