André Robert Breton was a French writer and poet, the co-founder, leader, and principal theorist of surrealism. His writings include the first Surrealist Manifesto of 1924, in which he defined surrealism as "pure psychic automatism". From Wikipedia
London exhibitions will display 250 Surrealist, postwar works led by Magritte’s La Statue volante ahead of a mid-September sale estimated at £60 million.