Born on 6 November 1875 at Cardiff, sixth child of John Forsdike, master mariner, and Mary Ann Thomas, his wife. A brother, George Frederick Forsdike (d 1936), a solicitor and stockbroker, became Lord Mayor of Cardiff. H S Forsdike was educated at Llandovery College and at University College, London. He served as house physician, and as clinical assistant in the ear and throat and the ophthalmic departments at University College Hospital. For some years he was a general practitioner at Chatham and at Porthcawl, Glamorganshire. During the Boer war he served with a Welsh regiment in South Africa. During the four years' war he was surgeon in charge of the surgical division of the Mile End Military Hospital and surgical specialist at the Paddington Military Hospital, and also served at Netley and at Bournemouth, with a commission as temporary lieutenant, RAMC dated 9 November 1914. He was invalided out of the Army in 1917. He then proceeded to take higher surgical degrees and to specialize as a gynaecological surgeon. He served as registrar and pathologist at the Hospital for Women, Soho Square from 1917, became gynaecological surgeon there in 1919, and consulting gynaecological surgeon in 1935, having been chairman of the medical committee 1934-35. He was also gynaecological surgeon to the Kensington General Hospital and the Princess Beatrice Hospital, Earl's Court, and consulting obstetrician to the Borough of Hammersmith. At the Royal College of Surgeons Forsdike was an examiner in midwifery for the Conjoint Board 1929-31; he won the Jacksonian prize in 1922 with his essay on "The effect of radium upon living tissues, with special reference to its use in the treatment of malignant disease" (published 1923), and was a Hunterian professor in 1924, lecturing on the same subject. Forsdike married on 20 April 1910 Dora, daughter of Thomas Jones, JP of Ynyshir, Glamorgan; Mrs Forsdike died on 25 November 1933. Forsdike practised at 5 Devonshire Place and at 10 York Gate. He retired from practice in 1936, and died at 68 Bickenhall Mansions, Portman Square on 29 March 1942, survived by his only daughter. He was buried at St Marylebone cemetery, East Finchley. In the early days of radium treatment for cancer Forsdike owned some radium, which he generously used for the benefit of his hospital patients. Publications:- Treatment of severe and persistent uterine haemorrhage by radium. *Brit med J*. 1926, 1, 472. *Sterility in women, diagnosis and treatment*. London, 1928. Sterility in women, in Maingot's *Postgraduate surgery*, 1936, 2, 2573-2632. *Textbook of gynaecology*. London, 1932.