Of Katherine’s four children, her second-born, Lauren, was undoubtedly her favourite. Cara, the eldest, was wilful and disobedient, while the two youngest, Robert and Alex, were as feeble and timorous as their father. Lauren was dutiful without being sycophantic, obliging without being needy. She never entered Katherine’s bedroom without knocking and, when she was invited in, she frequently brought with her curious gifts: snails from the garden, or a perfectly-round pebble or, on one occasion, the bones and beak of a bird which, cat-like, she laid at the foot of her mother’s bed.…