The son of Mr Ludlow, of Christ's Hospital, Hertford. He was educated at St Bartholomew's Hospital. He resided at 27 Charterhouse Square, and was Surgeon to the Metropolitan Free Hospital, and a member of the Paris Medical Society, the Pathological Society, and the Abernethian Society of St Bartholomew's Hospital, to the *Transactions* of which last, in 1852, he contributed a paper "On Carbuncular Inflammation of the Lips and other Parts of the Face". Other papers of his appeared in various medical journals, and in 1853 he won the Jacksonian Prize with his essay on "Diseases of the Testis and its Coverings, and their Treatment". Ludlow went to the Crimea in October, 1854, and as one of the acting Assistant Surgeons in charge of the sick on board the steamer *Trent* to Scutari he did such excellent service as to be most honourably mentioned by Lieut-Colonel C Townsend before the Roebuck Committee of the House of Commons. At Scutari he was stricken with the prevalent fever. After a three weeks' illness he died on April 4th, 1855, either at the Barrack Hospital or on board the Hospital Ship.