Compositions   1951: Concerto for Prepared Piano 1952: 4' 33" 1958: Piano Concerto 1960: Cartridge Music 1969: HPSCHD 1972: Bird Cage 1981: Thirty Pieces for Five Orchestras	English Poetry 1941: Eliot: Four Quartets     1955: Larkin: Church Going   1970: Hughes: Crow