"Roger stooped, picked up a stone, aimed and threw it at Henry- threw it to miss. The stone, that token if preposterous time, bounced five yards to Henry's right and fell in the water. Roger gathered a handful of stones and began to throw them. Yet there was a space round Henry, perhaps six yards in diameter, into which he dare not throw. Here, invisible yet strong, was a taboo of the old life. Round he squatting child was the protection of parents and school and policemen and the law. Roger was conditioned by a civilization that knew nothing of him and was in ruins."