Horace Montagu Jupe was born in Putney on 13 October 1893, the third child of William Digby Jupe, a jobber on the London Stock Exchange, and of Ella Jupe (née Hughes). After education at Hillside Preparatory School, Reigate, Charterhouse School, and Gonville and Caius College, Cambridge, he qualified at the London Hospital in 1917. While a medical student he served as a Surgeon-Probationer Sub-Lieutenant RNVR during the first world war from 1915, and as a temporary Surgeon-Lieutenant RN after qualifying in 1917. He was then receiving room officer, house surgeon, house physician and resident accoucheur at the London Hospital, acknowledging his indebtedness to Russell Howard, of whom he was especially fond, and to Sir James Walton and Jonathan Hutchinson, Jnr. An aptitude for physics attracted him to radiology, and, after taking his diploma, he was appointed radiologist to the London and was director of the department from 1943 until his retirement in 1958. Jupe was a founder member of the British Association of Radiologists when it was formed in 1934, and its honorary secretary when it amalgamated with the Society of Radiotherapists to form the Faculty of Radiologists. He was Vice-President of the diagnostic section of the Faculty 1948-49, and Warden of the Fellowship 1951-56 as well as an active member of the British Institute of Radiology, serving on its council from 1947 to 1950. He was President of the Section of Radiology of the Royal Society of Medicine and his contributions to his speciality were also recognised by the Roentgen Award in 1937, Honorary Fellowship of the Australian College of Radiologists in 1953, and the Skinner Lectureship in 1959. Though noted for his eclectic interests, he developed a special interest in radiology of the central nervous system, working closely with Sir Hugh Cairns with whom he jointly wrote the section on the central nervous system in the *Textbook of radiology by British authors*. He also worked closely with Dr Donald Hunter on the constitutional diseases of bone and collaborated with him in writing the appropriate section of the same textbook of radiology. Jupe wrote further papers on ventriculography, cerebral tumours and hydrocephalus. Outside his strictly technical work he was notable as a kind and considerate colleague whose old-world courtesy and concern for others made him especially popular with his juniors, most of whom kept in touch with him after leaving the London. A highly experienced skier in his younger days, he turned to gardening for interest and relaxation during his long retirement. He married Isabel Rainey in 1925 and they had no children. When he died on 6 May 1980, aged 86, he was survived by his wife.