Second son of Edward John Lucy, of the firm of Lucy and Townsend, millers and corn merchants, Albion Mills, Worcester, he was born at Sidbury House, Worcester, 25 February 1863. He was educated at the Cathedral School, Worcester, where he was a King's Cathedral scholar and entered Malvern College in 1879, leaving in 1880. At Malvern he lived in the house of the Rev F R Drew, a good mathematical and science teacher and a successful, if eccentric, housemaster. Lucy's father having died at the age of thirty-six leaving his widow with six children, Horace was sent to Edinburgh, where he graduated MB CM with first-class honours in 1885. He then proceeded to the London Hospital and acted as house surgeon and receiving room officer. In 1887 he was house surgeon at the South Devon and East Cornwall Hospital, Plymouth, and returning to London in 1888 he acted as assistant medical officer to the General Post Office and occupied his spare time in reading for the FRCS. He then travelled for a year as surgeon in one of the Peninsular and Oriental Company's boats, and settled in surgical practice at Plymouth in 1890. In this year he was elected assistant surgeon to the South Devon and East Cornwall Hospital, becoming surgeon in 1897, and consulting surgeon to the Liskeard, Kingsbridge, and St Barnabas Cottage Hospitals, and district surgeon to the Plymouth division of the Great Western Railway. During the war Lucy served as a major at the 4th Southern General Hospital, Plymouth, retiring on the ground of ill-health in 1916, and after that date lived at Abbotswood, Guildford. He married in 1892 Emily Susan (d 1920), daughter of Robert Shackleford Cross, MRCS, of Petersfield, Hants, and by her had two sons, one of whom was killed in action in March 1915. He died at Sunnymead, Abbotswood, Guildford on 9 May 1931, and was buried at Burpham Church, near Guildford. Lucy had literary aspirations, though he made no contribution to surgical literature. He was vice-president of the Plymouth Medical Society and was for some time local secretary of the New Sydenham Society. Being very distantly connected with the Lucys of Charlecote Park, Stratford-on-Avon, he was an excellent example of reversion to type, for, walking across Charlecote for the first time to see the house and grounds of his ancestors, the labourers he met all touched their hats to him and when he asked why told him that they recognized him as one of the family by his walk and general appearance.