ARDERNE, JOHN (c. 1306—c. 139o), English surgeon, prac tised first at Newark and then in London, and also in the army in France. He introduced certain new operations and was a bold and skilful surgeon and a good writer on his subject. See D'Arcy Power: Treatises of Fistula in Ano, etc. (1910) ; "The Lesser Writings of John Arderne," XVIIth Inter. Con. Med. Sec. XXIII.