Following the Anschluss in 1938, his comfortable childhood was interrupted by enforced emigration and he was sent, with his sister, Verena, to England. Within a few days and with hardly a word of English, he found himself at boarding school in Bishop’s Stortford. He always denied that this uprooting was traumatic and agreed with his friend, the late Professor Peter Scheuer, that “the best thing that ever happened to us was to come to England.” Klaus’s parents and grandparents soon followed and he was sent to Clifton College. In 1945 he gained an Exhibition to read medicine at Queen’s College, Oxford a city that was important to him throughout his life. In 1948, he won a scholarship to the London Hospital, completing his clinical training in December 1951. He was appointed to two house officer posts at the London, and served two years national service, mostly as a medical specialist. After a clutch of junior positions elsewhere, he returned to the London as a registrar. He was appointed senior registrar at the Radcliffe Infirmary in 1962 and in 1966 received his doctorate. Eager to become a consultant, he spent a happy year at the Massachusetts General Hospital. Returning to Oxford, Dr Schiller worked with his mentor and lifelong friend Dr Sidney Truelove. They undertook an in-depth survey of haematemesis and melaena, and the risky abdominal surgical interventions that were undertaken as a result.