The tidy Dutch were checking over the books of Amsterdam’s famed Concertgebouw Orchestra. But it was not in order: conductor and collaborator Mengelberg, was still down for fl.10,00.

The tidy Dutch were checking over the books of Amsterdam’s famed Concertgebouw Orchestra. If everything was in order, Conductor Eduard van Beinum’s musicians would get their annual subsidy as usual. But this time everything was distinctly not in order: Van Beinum’s predecessor, the great Dutch conductor Willem Mengelberg, was still…