He was born in London on 29 August 1896 son of Henry John Jeaffreson, insurance broker, and his wife née Gregory. The Jeaffresons came from Framlingham, Suffolk, and there had been several well-known surgeons in the family; William Jeaffreson FRCS (1844) performed the first successful ovariotomy in England in 1836. B L Jeaffreson was educated at Hurstpierpoint and St Bartholomew's Hospital, which he entered in August 1914 just as war broke out. He enlisted in the Honourable Artillery Company and served as a combatant in France for two years, being invalided out of the army in 1917. He returned to St Bartholomew's, qualified in 1921, and served as house surgeon and resident intern midwifery assistant; he was awarded the Willett medal in operative surgery in 1921. He took the London MD in 1924, and served as house physician at the London Chest Hospital. He moved to Sheffield in 1926, and worked under Miles Phillips as senior resident officer at the Jessop Hospital for Women; but transferred in 1928 to Birmingham, as registrar to the gynaecological department and the surgical unit at the General Hospital under Beckwith Whitehouse. He was appointed assistant surgeon at the Hospital for Women at Leeds in 1930, and made his life's career there. He also was appointed tutor in obstetrics and gynaecology at Leeds University, and later became senior clinical lecturer, a post in which he made considerable mark for he was an excellent teacher as well as a good technical surgeon. He succeeded McGregor Young as surgeon to the Leeds Maternity Hospital in 1934. Jeaffreson examined for the universities of Leeds, Manchester, and Sheffield, and was presiding examiner at Leeds for the Central Midwives Board. He was an active member of the North of England Obstetric and Gynaecological Society, organised the 13th British Congress of Obstetrics and Gynaecology at Leeds in 1952, and was president-elect of the Society for 1953. He sat in the Council of the Royal College of Obstetricians and Gynaecologists as a Member from 1943 to 1949 and was elected a Fellow in 1950. Jeaffreson married Miss Bunting in 1930; she survived him with a son and daughter. He died suddenly at 28 Ring Road, Headingley, on 7 January 1953 aged 56, having practised at 32 Park Square, Leeds. In spite of his abilities and achievement he was modest to a fault. Publication: Basal cells in the epithelium of the human cervical canal, with B Carmichael. *J Path Bact* 1939, 49, 63.