“The next morning at school a group of parents burst into the classroom, waving the nit letter and shouting. Miss Battle-Axe squared her shoulders. ‘Rest assured that the culprit will be found.’ she said. ‘I have declared war on nits.’ Scratch, Scratch, Scratch. Miss Battle-Axe spun round. Her beady eyes swivelled over the class. ‘Who’s scratching?’ she demanded. Silence”