Complex sentence: After 1923 he failed to secure a permanent conductorship in the UK, and for much of the rest of his life he guest conducted in continental Europe and the US in his last years he took orchestral appointments in South Africa, where he died at 71.
Split into simpler sentences: After 1923 he failed to secure a permanent conductorship in the UK, and for much of the rest of his life he guest conducted in continental Europe and the US. In his last years he took orchestral appointments in South Africa, where he died at 71.