Composed in 1751, Handel’s Jephtha is based on the story from Judges XI and George Buchanan’s 1554 play Jephthes, sive Votum. It sees the Israelite Jephtha triumph in battle over the Ammonites, but then face the most dreadful situation. This is because he had vowed that if he were victorious he would sacrifice the first living creature he saw on his return, and this turns out to be his daughter Iphis. To make the work acceptable to an eighteenth century audience,...