Harry Hiller, as he was generally known, son of Dr Konrad Hiller, was educated at Melbourne Grammar School. After graduating in medicine at Melbourne University in 1942 he spent a year at the Royal Melbourne Hospital as RMO before serving for the remainder of the war as a flight lieutenant medical officer in the RAAF. He returned to the Royal Melbourne Hospital as assistant clinical pathologist and the senior RMO before moving on to the Children's Hospital, Melbourne, as clinical supervisor and associate physician, and later first assistant physician to outpatients. He took out his MRACP and graduated MD in 1949. Harry then undertook training, and obtained specialist qualifications, in radiology, becoming a member of the College of Radiologists in 1953. He was appointed in turn as registrar in charge of the department of radiology of the Children's Hospital and then director of that department in 1953. He held that post until 1972 when he moved to Alice Springs hospital as radiologist. In his letter of resignation from the Royal Children's Hospital he cited his hypertension, but also, in his won words "that younger talent should be encouraged to come through the department". He finally retired in 1979. He had become FRCRA in 1960 and FRACP in 1971.

In addition to his commitment to radiology, Harry had a substantial interest in paediatric cardiology, commencing with association with Morstyn Powell in the early years of the postwar cardiac clinic, and continuing with development of investigatory techniques. He was an ingenious inventor. He developed first a simple manually operated film changing device for angiocardiography with an 8 mm camera and continuous loop projection using a projector that had belonged to his father. When image intensification and appropriate 35 mm cameras became available he produced a mechanical cable camera linkage that enabled simultaneous biplane filming with a single exposure control system. This gave a means for biplane 35 mm cineangiocardiography at a time when this was not generally available. With Alan Wynne (qv) he set up the first facilities for cardiac catheterisation at the Children's Hospital in 1955 and he continued to assist the cardiac unit by performing himself catheterisations for most of his time as director of radiology. Harry also initiated the "in-house" production of tapered catheters from bulk tubing for percutaneous arterial catheterisation, and promoted that technique both in cardiology and in the various areas of visceral angiography that interested him.

He had diverse interests in other areas of radiology, as well as commitments to the development and administration of his department, where he had to face the increasing problems of storage and culling of films, and where he set up an extensive library of reference films. Harry was an active participant in the Australian Paediatric Association where he was a protagonist of the controversial possibility of socalled "metaphyseal fragility" as an alternative explanation of certain bone lesions to that of the trauma of child abuse. He was also active in the College of Radiologists and was a member of the Cardiac Society of Australia and New Zealand. He took part actively in the affairs of the Children's hospital both as director of radiology and in the Senior Medical Staff Association of which he was ultimately chairman.

Harry was a regular golfer. He was also notable to his colleagues for his interest in and ownership of unusual motorcars, including at carious times a "Goggomobil" and an early rotary engined Mazda. He married Margaret Campbell and they had four children; one daughter and three sons including twins. In summary, Harry Hiller was a man with widespread professional and other interest, and considerable initiative, who made a substantial contribution particularly to paediatric radiology through his work at the Royal Children's Hospital in Melbourne, and who earned a widespread reputation for this despite the fact that he did relatively little travelling overseas.