Born 15 November 1870 in Bedford Place, WC, the son of Walter Tyrrell, MRCS, anaesthetist to St Thomas's Hospital, with which he had an hereditary connexion. His father was afterwards in general practice in South Kensington in partnership with Sir Robert Fox-Symons, KBE, who was also educated at St Thomas's Hospital; his mother's maiden name was Sara Wrench. Francis was educated at Malvern College and proceeded from there to Clare College, Cambridge, where he graduated in Arts in 1892. He received his medical education at St Thomas's Hospital, and served as senior ophthalmic house surgeon and afterwards as surgical out-patient officer at the Royal London Ophthalmic Hospital. He afterwards became surgeon to the London School Board. He married Nellie Hallett on 1 June 1906, who survived him and died on 6 June 1944. He died on 1 January 1933, aged 62, survived by his wife, a son and a daughter. Publications: Congenital malformation of the lower eyelids. *Trans Ophthal Soc UK* 1903, 23, 263. Two cases of Mooren's ulcer treated with conjunctival flap. *Ibid* 1917, 37, 205. Symmetrical pigmented changes at the macula. *Ibid* 1917, 37, 237. Contagious disease of the conjunctiva. *Ibid* 1918, 38, 59. Trachoma in London Schools. *Int Congr Sch Hyg* 2, London 1907, *Trans* 1908, 2, 711.