Ernest Hemingway was reared by church-going parents as a Congregationalist. His first son was christened in the Church of England. Then soon after his first marriage to Hadley Richardson had ended in divorce and he married his mistress Pauline Pfeiffer, he became a Catholic – supposedly after an intimate health problem was healed through prayer.

That, at least, was what he told his friend AE Hotchner more than 20 years later. And Hotchner seems to have accepted it. But then in the early days of their friendship, he accepted everything Hemingway said.