Mahler’s deeply personal Tenth Symphony deals with death, redemption, and salvation and is seen by many as a farewell to life. Left as a single Adagio plus fragments of four further movements, it was realised for performance by the Mahler / Bruckner expert Deryck Cooke and premiered at the Proms in 1964. Cooke called his realisation ‘a performing version of the draft for the Tenth Symphony’ and was always concerned to stress that it was in no sense a completion, since only Mahler himself could have completed the work. Symphony No. 10 has since become an established part of the repertoire alongside Mahler’s completed symphonies.