Next they got their marbles and played "knucks" and "ring-taw" and "keeps" till that amusement grew stale. Then Joe and Huck had another swim, but Tom would not venture, because he found that in kicking off his trousers he had kicked his string of rattlesnake rattles off his ankle, and he wondered how he had escaped cramp so long without the protection of this mysterious charm. He did not venture again until he had found it, and by that time the other boys were tired and ready to rest. They gradually wandered apart, dropped into the "dumps," and fell to gazing longingly across the wide river to where the village lay drowsing in the sun. Tom found himself writing "BECKY" in the sand with his big toe; he scratched it out, and was angry with himself for his weakness. But he wrote it again, nevertheless; he could not help it. He erased it once more and then took himself out of temptation by driving the other boys together and joining them.