Nanny’s heart sank at the sight of the third witch, and it wasn’t because Letice Earwig was a bad woman. Quite the reverse, in fact. She was considered to be decent, well-meaning and kind, at least to less-aggressive animals and the cleaner sort of children. And she would always do you a good turn. The trouble was, though, that she would do you a good turn for your own good even if a good turn wasn’t what was good for you. You ended up mentally turned the other way, and that wasn’t good.