Denis George Calvert was a consultant surgeon at Gloucester Royal Infirmary. He was born in Belfast on 23 April 1928, where his father Thomas George Calvert was an insurance manager. His mother, Isobel née Stafford, was the daughter of the fire chief of Belfast. He was educated at Epsom and the Middlesex Hospital, where he won the Freer Lucas scholarship and the Asher Asher prize. After junior posts at Harold Wood, Mount Vernon and the Middlesex Hospitals, he did his National Service in the RAMC, and then spent a year as a ship's surgeon on the Orient Line in 1956. He returned to become paediatric surgical registrar at the Westminster, registrar at Kettering Hospital and senior registrar at the Bristol Royal Infirmary, where he worked for Robert Cooke. He was appointed consultant surgeon to Gloucester Royal Hospital in 1967, where he made urology his special interest. He was a member of council of the British Association of Urological Surgeons. He was not afraid to embrace new technology and, when the minimally invasive technique of percutaneous nephrolithotomy came to the fore from the Institute of Urology in the mid 1980's, Denis had the foresight to appreciate this major advance and pressed for the appointment at Gloucester of a talented interventional radiologist, allowing him to become one of the first urologists outside London to remove renal stones percutaneously. By the time he retired in 1990 he had, with colleagues, been instrumental in building the Gloucester surgical department into a first class unit with sub-specialisation well developed. In 1962 he married Penelope Vince, and they had two sons, David and Ian, and one daughter, Sarah. His retirement was relaxed and enjoyable, playing golf, gardening and adding to his extensive wine collection. Sadly, in 1998 he developed lung cancer, showing great courage in the terminal stages of his illness. He died on 24 April 1999.