A pioneering neurosurgeon, Cairns worked extensively in the field of head injuries and was one of the first to promote the use of crash helmets for motor cyclists.
Best known as a governor of South Australia, Sir Mark Oliphant was also a pioneering nuclear physicist who became an outspoken anti-nuclear campaigner.
Philosopher, Chancellor of the University of Adelaide, and a teacher of economics, psychology and literature, Sir William Mitchell was nothing if not a polymath.