A return visit by Ernest Ansermet to conduct Honegger 's King David had been planned to mark the 10th anniversary of Honegger 's death .
Ernest Ansermet was ill and Sir Adrian Boult took over at short notice .
A return visit by Ernest Ansermet to conduct Honegger 's King David had been planned to mark the 10th anniversary of Honegger 's death , but Ansermet was ill and Sir Adrian Boult took over at short notice .