Adrian Cousins was a consultant surgeon in Sydney, Australia. He was born in Sydney, New South Wales, on 20 July 1928. His father, Gordon James Cousins, was a doctor, and his mother, Yvonne Effie Matild Zani née de Ferranti, a housewife. He was educated in Sydney; at Belmore Primary School, the Erskinville Opportunity Class for Gifted Children (from 1938 to 1939) and then Sydney Boys High School. He then studied medicine at Sydney University. He undertook surgical training in England as there was no surgical training in Australia after the Second World War. He was a surgical resident at Haymeads Hospital, Bishop's Stortford. He studied anaesthetics at St George's on Hyde Park Corner, orthopaedics under Tommy Sergeant at Nuneaton, thoracic and plastic surgery at Hyde Park Corner in 1954. In 1955 he studied accident and emergency surgery under Lionel Jones at Nuneaton and general surgery under Trevor Berrill in Coventry. In 1956 he studied general surgery under Sir Rodney Smith at St George's. The friendships he made during his postgraduate training were enduring. In December 1957 he returned to Australia. In 1959 he was appointed as a consultant surgeon to the Canterbury Hospital, Sydney, a post he held until 1962. He was then a consultant surgeon at the Sutherland Hospital, Sydney, until 1976. From 1976 to 1988 he was director of surgical services at the Sutherland Hospital. He retired in 1988. He was a member of the Australian Medical Association, the Australian Association of Surgeons, and the sections on colon rectal surgery and general surgery at the Royal Australasian College of Surgeons. He was a member of the Society for Growing Australian Plants and the Australian Stock Horse Society. He enjoyed skiing, tennis, rugby union, squash, swimming, farming (sheep, cattle and horse breeding) and cultivating Australian native plants. He was a member of the Volunteer Bushfire Brigade in Bungonia, New South Wales. He married Helen Collier Southward in 1953 in London. They had two sons (Peter Gordon Ziani, now deceased, and Timothy James Ziani) and two daughters (Penelope Joy and Hilary Jane). He had six grandchildren. He died on 12 May 2006 in Canberra, in a nursing home, of respiratory failure.