This Changeling-custom was another social device set up millennia ago to keep a mutual understanding between all species on the planet. It was a peculiar institution, one that the Earthmen had found hard to understand and ever more difficult to adopt. Nevertheless, once the Skins had been accepted they had changed their attitude, forgot their speculations about its origin and threw themselves into the custom of stealing babies--or eggs--from another race and raising the children as their own. _You rob my cradle; I'll rob yours._ Such was their motto, and it worked. A Guild of Egg Stealers was formed. The Human branch of it guaranteed, for a price, to bring you a Ssassaror child to replace the one that had been stolen from you. Or, if you lived on the sea-shore, and an Amphibian had crept into your nursery and taken your baby--always under two years old, according to the rules--then the Guildsman would bring you an Amphib or, perhaps, the child of a Human Changeling reared by the Seafolk. You raised it and loved it as your own. How could you help loving it? Your Skin told you that it was small and helpless and needed you and was, despite appearances, as Human as any of your babies. Nor did you need to worry about the one that had been abducted. It was getting just as good care as you were giving this one. It had never occurred to anyone to quit the stealing and voluntary exchange of babies. Perhaps that was because it would strain even the loving nature of the Skin-wearers to give away their own flesh and blood. But once the transfer had taken place, they could adapt. Or perhaps the custom was kept because tradition is stronger than law in a peasant-monarchy society and also because egg-and-baby stealing gave the more naturally aggressive and daring citizens a chance to work off anti-social behavior. Nobody but a historian would have known, and there were no historians in The Beautiful Land. Long ago the Ssassaror had discovered that if they lived meatless, they had a much easier time curbing their belligerency, obeying the Skins and remaining cooperative. So they induced the Earthmen to put a taboo on eating flesh. The only drawback to the meatless diet was that both Ssassaror and Man became as stunted in stature as they did in aggressiveness, the former so much so that they barely came to the chins of the Humans. These, in turn, would have seemed short to a Western European.