Prof Percy Samuel Lelean CMG Order of the Nile MID FRSE FRCS DPH (1871–1956) was a Canadian-born surgeon who specialised in issues of Public Health. He served with distinction in the First World War
He was born in Canada on 21 July 1871 the son of William Cox Lelean. He studied Medicine at Hart House in Canada then sent to Britain to St Mary's Hospital, London.
In the First Boer War he volunteered for the Army Medical Services and saw action throughout South Africa, winning the Queen’s Medal four times. Staying in Africa he served on the Anglo-French Boundary Commission in 1903, considering international boundaries from the River Niger to Lake Chad. He then served as an army surgeon in India until 1912.
He served as a Major in the Royal Army Medical Corps during the First World War. He was four times Mentioned in Dispatches. During the war he was also employed as a specialist at the Anti Gas Department in Millbank. He retired from the army at the rank of Colonel in 1922.
In 1926 he took the Usher Chair in Public Health at Edinburgh University. In 1930 he was elected a Fellow of the Royal Society of Edinburgh. His proposers were Ralph Allan Sampson, James Hartley Ashworth, Sir Edward Albert Sharpey-Schafer and Sir William Wright Smith. In 1944 he retired fully and was succeeded by Prof Francis Albert Eley Crew.