Deryck Cooke (1919-1976) was a distinguished musicologist, and a composer and author, notably of the ground-breaking The Language of Music (OUP 1959). After studying at Cambridge University, most of his career was spent as a senior producer for the BBC’s music department. His lasting memorial is the performing version of the unfinished draft of Mahler’s 10th Symphony, which received its first performance at the 1964 Proms and has subsequently become firmly established in the repertoire.