Born at Islington on 12 June 1863, the eldest son of John Barnett, public secretary, and Emma Sewell, his wife. He was at school at Streatham Hill and at Oxford, before entering Charing Cross Hospital Medical School; where he won the Bone prize in 1881 and the physiology medal in 1882. After qualifying in 1888 he served as surgeon with the Anchor, Atlantic transport, and Glen steamship companies, sailing in SS *Manitoba*, Tower Hill, Karamaina, and other ships. During this period his home was at 20 Ditchling Road, Brighton. In 1895 he was at 100 Holland Road, Kensington and next year at 1 Delamere Terrace, Paddington, while working for the Fellowship, which he took in 1897. He then settled in practice at Kingston Hill and became surgeon to the Kingston Victoria Infirmary. Barnett died at 49 Queen's Road, Kingston Hill, Surrey, after an accident, on 13 March 1941, and his body was cremated at Putney. He had never married. He left a residue of his property to the Seaman's Hospital Society, Greenwich. Publications:- Quarantine at New York. *Lancet*, 1891, 1, 800. Spasmodic dyspnoea, enlarged thymus, tracheotomy. *Ibid*. 1898, 1, 1185. A case of separation of the lower epiphysis of the tibia. *Ibid*. 1898, 1, 1721.