Trevelyan studied at Bedales School and at Trinity College in Cambridge. He later enrolled at the Atelier Dix-Sept in Paris and worked alongside Max Ernst, Oskar Kokoschka, Joan Miró and Pablo Picasso. A confirmed Surrealist, Trevelyan exhibited at the International Surrealist Exhibition. His first solo exhibition was at the Lefevre Gallery in 1937. In 1951
