"“What precisely was it you wanted, madam?” she said. It’s just that I’ve left the class doing algebra, and they get restless when they’ve finished.” “Algebra?” said Madam Frout, perforce staring at her own bosom, which no one else had ever done. “But that’s far too difficult for seven-year-olds!” “Yes, but I didn’t tell them that and so far they haven’t found out,” said Susan. (p. 95)"