Orphans are everywhere in literature — Jane Eyre, Heathcliff, Oliver Twist, Daniel Deronda, and onwards to the present day. They are obviously useful to storytellers, and particularly to the writers of children’s books, who naturally want their heroes to undertake adventures without the controlling eye of ordinarily caring parents. The parents of Roald Dahl’s James have to be killed by a rhinoceros for his satisfyingly swashbuckling adventure in a flying giant peach to take place.