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18 Among the Battas of Sumatra these laws of avoidance affect all near relationships. For instance, it would be most offensive for a Battan to accompany his own sister to an evening party. A brother will feel most uncomfortable in the company of his sister even when other persons are also present. If either comes into the house, the other prefers to leave. Nor will a father remain alone in the house with his daughter any more than the mother with her son. The Dutch missionary who reported these customs added that unfortunately he had to consider them well founded. It is assumed without question by these races that a man and a woman left alone together will indulge in the most extreme intimacy, and as they expect all kinds of punishments and evil consequences from consanguinous intercourse they do quite right to avoid all temptations by means of such prohibitions.

Among the Barongos in Delagoa Bay, in Africa, the most rigorous precautions are directed, curiously enough, against the sister-in-law, the wife of the brother of one’s own wife. If a man meets this person who is so dangerous to him, he carefully avoids her. He does not dare to eat out of the same dish with her; he speaks only timidly to her, does not dare to enter