Robert Guerin was born in Adelaide on 8 July 1932. His father, Robert Guerin, and mother, Vera Jean née Langley, were both schoolteachers. He was educated at Adelaide High School, where he won numerous prizes and became head prefect. He qualified with credit, winning the gynaecology prize, from the

Malcolm was born into a medical family in 1928. His father, Malcolm (Senior), was an ear nose and throat surgeon, one of Malcolm's brothers became a paediatrician and the other a psychiatrist. Malcolm was educated at Medbury Preparatory School and at Christ's College. After spending a year at Canter