Born 15 June 1878 at Liverpool, the second child and second son of Sir Alexander Jeans, JP, then editor of the *Derby Reporter* and afterwards director and managing editor of the *Liverpool Daily Post and Echo* and Ellen Gallon, his wife. He was educated at Birkenhead School and matriculated from there at St John's College, Cambridge, where he graduated in Arts in 1899, taking the degrees of MB BCh in 1906. He received his medical education at King's College Hospital and at St Bartholomew's Hospital, and was appointed house surgeon at the Liverpool Royal Infirmary where he was elected assistant surgeon in 1909, and succeeded Thelwall Thomas as surgeon in 1924. In the University of Liverpool he held a scholarship in surgical pathology, was a demonstrator of anatomy, and was lecturer on clinical surgery. He received a commission as temporary major, RAMC (T) on 2 January 1917 and was attached to the No 6 British Red Cross (Liverpool Merchants) Mobile Hospital. He served in France and was appointed senior surgeon, relinquishing his commission but retaining the honorary rank of major, on ceasing to be employed, from 16 December 1918. His special interest in urology brought him into considerable prominence, and he acted as consultant to the Liverpool Medical Research Organization. He was elected president of the urological section of the Royal Society of Medicine in 1929. He was also a vice-president of the Liverpool Medical Institution. He married in 1907 Eveline (d 1928), daughter of Garrett James Barry. He died at Harrogate on 21 June 1933, survived by a son and a daughter. Jeans was looked upon as the best after-dinner speaker in Liverpool, a master of felicitous phrases with a fund of whimsical humour and rapier-like wit. But behind the wit and humour was sound judgment based upon wide knowledge, an understanding of human nature, and a great gift of charity. Publications: Ten consecutive cases of acute general or perforative peritonitis. *L'pool med chir J* 1910, 30, 108. Subphrenic abscess. *Ibid* 1912, 32, 130. Desmoid tumours of the abdominal wall. *Ibid* 1914, 34, 105. Treatment of acute peritonitis. *Lancet*, 1925, 1, 729.