John Devoto may have been the son of a London-based painter and scene designer of Italian descent, also named John Devoto (active 1708-1752). Devoto junior is recorded as having lived at ‘Mrs. Goadsby’s’ in Bedford Street, Covent Garden. He established a drawing school at 139 Longacre in 1775. However, he is known to have exhibited only one work, ‘A Flower Piece; in Indian Ink’ at the Society of Artists of Great Britain in 1776.