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O'Connor graduated in law from University of Melbourne and served with the Army during the Second World War. In 1939 he studied art at the George Bell School, Melbourne for a time but was mostly self-taught as an artist.
His second wife Vera died in 2004. Towards the end of his life he was unable to paint due to arthritis and failing eyesight.
- CAS (Melbourne Show) 1941
- One-man and group shows in Australia[which?]
- Exhibitions in London, Canada and USSR[which?]
- Bloomfield Galleries, Sydney 1980
- Retrospective show 1939 - 1983, Gryphon Gallery, Melbourne 1983
- National Gallery of Australia
- National Gallery of Victoria
- Art Gallery of New South Wales
- Tasmanian Art Gallery
- Queensland Art Gallery
- Regional galleries in Rockhampton, Benalla and Bendigo[which?]
- Private and institutional collections in Australia and overseas[which?]
- "Realist movement painter who was struck by harsh truths". The Age. Melbourne. Retrieved 17 October 2012.
- Bernard Smith, Australian Painting 1788 - 1970, Oxford University Press 1974
- Allan McCulloch, Encyclopedia of Australian Art, Hutchinson 1977
- Jean Campbell, Australian Watercolour Painters 1780 - 1980, Rigby 1982
- Max Germaine, Artists and Galleries of Australia, Boolarong 1984