Born on 2 September 1874, the second child of Joseph Addison and Marianne Brown his wife. He was educated at Marlborough College and at University College, London. After serving as house surgeon to (Sir) Victor Horsley at University College Hospital, where he formed a friendship with George Waugh, qv, he was surgical registrar there and at the West London Hospital. He then succeeded Waugh as resident medical superintendent at the Hospital for Sick Children, Great Ormond Street. With the West London and the Hospital for Sick Children he maintained a life-long connexion, retiring as consulting surgeon to each. He was also surgeon to the Infants' Hospital, Vincent Square, the Princess Louise Kensington Hospital for Children, and the Chiswick Cottage Hospital. He was an original member of the medical advisory board of the Treloar Hospital at Alton and was the second chairman of its executive committee. Addison was a painstaking and careful operator, gifted with dexterity and gentleness; though of good judgement he liked to defer to the opinion of his colleagues. He was particularly interested in the surgery of children, and a pioneer in the treatment of developmental errors of the genito-urinary system. He was an active member of the West London Medico-chirurgical Society. Addison married in 1909 Kate Brown, MB BS London 1908, who survived him less than three months, but without children. He was a keen salmon-fisherman and a student of the bird-life of the London reservoirs. He died at Bradfield Hall, Bury St Edmunds, Suffolk, on 8 January 1942, in his sixty-eighth year. Mrs Addison qualified from the London School of Medicine for Women. She was clinical assistant in the skin departments at University College Hospital, the Evelina Hospital, and the Royal Free Hospital; clinical assistant at the Hospital for Sick Children and St John's Hospital for Diseases of the Skin; and temporary physician to the Hospital for Diseases of the Skin, Blackfriars Road. She died suddenly on 24 March 1942. Publication: *Cystoscopy, in Garrod and Thursfield Diseases of children*.