As late as 1953 he told his secretary Levas that he was working on the symphony "in his mind"; only in 1954 did he admit, in a letter to the widow of his friend Adolf Paul, that it would never be completed.
Aínda en 1953 díxolle ao seu secretario, Santeri Levas, que estaba a traballar na sinfonía "na súa mente"; só en 1954 admitiu, nunha carta á viúva do seu amigo Adolf Paul, que nunca podería ser completada.