Mr Felton rapped the table with his knuckles. ‘Even the length of a single vowel matters, Robin Swift. Consider the Bible. The original Hebrew text never specifies what sort of forbidden fruit the serpent persuades Eve to eat. But in Latin, malum means “bad” and mālum,’ he wrote the words out for Robin, emphasizing the macron with force, ‘means “apple”. It was a short leap from there to blaming the apple for the original sin. But for all we know, the real culprit could be a persimmon.’