Such restrictive prohibitions are directed in Melanesia against the relations of boys with their mothers and sisters. Thus, for instance, on Lepers Island, one of the New Hebrides, the boy leaves his maternal home at a fixed age and moves to the ‘clubhouse’, where he there regularly sleeps and takes his meals. He may still visit his home to ask for food; but if his sister is at home he must go away before he has eaten; if no sister is about he may sit down to eat near the door. If brother and sister meet by chance in the open, she must run away or turn aside and conceal herself. If the boy recognizes certain footprints in the sand as his sister’s he is not to follow them, nor is she to follow his. He will not even mention her name and will guard against using any current word if it forms part of her name. This avoidance, which begins with the ceremony of puberty, is strictly observed for life. The reserve between mother and son increases with age and generally is more obligatory on the mother’s side. If she brings him something to eat she does not give it to him herself but puts it down before him, nor does she address him in the familiar manner of mother and son, but uses the formal address. Similar customs obtain in New Caledonia. If brother and sister meet, she flees into the bush and he passes by without turning his head toward her18.
On the Gazella Peninsula in New Britain a sister, beginning with her marriage, may no longer speak with her brother, nor does she utter his name but designates him by means of a circumlocution19.
In New Mecklenburg some cousins are subject to such restrictions, which also apply to brothers and sisters. They may neither approach each other, shake hands, nor give each other presents, though they may talk to each other at a distance of several paces. The penalty for incest with a sister is death through hanging20.
These rules of avoidance are especially severe in the Fiji Islands where they concern not only consanguineous sisters but group sisters as well.
To hear that these savages hold sacred orgies in which persons of just these forbidden degrees of kinship seek sexual union would seem still more peculiar to us, if we did not prefer to make use of this contradiction to explain the prohibition instead of being astonished at it21.
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 consanguineous intercourse they do quite right to avoid all temptations by means of such prohibitions22.
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 her hut, and greets her only with a trembling voice23.
Among the Akamba (or Wakamba) in British East Africa, a law of avoidance is in force which one would have expected to encounter more frequently. A girl must carefully avoid her own father between the time of her puberty and her marriage. She hides herself if she meets him on the street and never attempts to sit down next to him, behaving in this way right up to her engagement. But after her marriage no further obstacle is put in the way of her social intercourse with her father24.
The most widespread and strictest avoidance, which is perhaps the most interesting one for civilized races is that which restricts the social relations between a man and his mother-in-law. It is quite general in Australia, but it is also in force among the Melanesian, Polynesian and Negro races of Africa as far as the traces of totemism and group relationship reach, and probably further still. Among some of these races similar prohibitions exist against the harmless social intercourse of a wife with her father-in-law, but these are by far not so constant or so serious. In a few cases both parents-in-law become objects of avoidance.
As we are less interested in the ethnographic dissemination than in the substance and the purpose of the mother-in-law avoidance, I will here also limit myself to a few examples.
On the Banks Island these prohibitions are very severe and painfully exact. A man will avoid the proximity of his mother-in-law as she avoids his. If they meet by chance on a path, the woman steps aside and turns her back until he is passed, or he does the same.
In Vanna Lava (Port Patterson) a man will not even walk behind his mother-in-law along the beach until the rising tide has washed away the trace of her footsteps. But they may talk to each other at a certain distance. It is quite out of the question that he should ever pronounce the name of his mother-in-law, or she his25.
On the Solomon Islands, beginning with his marriage, a man must neither see nor speak with his mother-in-law. If he meets her he acts as if he did not know her and runs away as fast as he can in order to hide himself26.
Among the Zulu Kaffirs custom demands that a man should be ashamed of his mother-in-law and that he should do everything to avoid her company. He does not enter a hut in which she is, and when they meet he or she goes aside, she perhaps hiding behind a bush while he holds his shield before his face. If they cannot avoid each other and the woman has nothing with which to cover herself, she at least binds a bunch of grass around her head in order to satisfy the ceremonial requirements. Communication between them must either be made through a third person or else they may shout at each other at a considerable distance if they have some barrier between them as, for instance, the enclosure of a kraal. Neither may utter the other’s name27.
Among the Basogas, a negro tribe living in the region of the Nile sources, a man may talk to his mother-in-law only if she is in another room of the house and is not visible to him. Moreover, this race abominates incest to such an extent as not to let it go unpunished even among domestic animals28.
Whereas all observers have interpreted the purpose and meaning of the avoidances between near relatives as protective measures against incest, different interpretations have been given for those prohibitions which concern the relationship with the mother-in-law. It was quite incomprehensible why all these races should manifest such great fear of temptation on the part of the man for an elderly woman, old enough to be his mother29.
The same objection was also raised against the conception of Fison who called attention to the fact that certain marriage class systems show a gap in that they make marriage between a man and his mother-in-law theoretically not impossible and that a special guarantee was therefore necessary to guard against this possibility.
Sir J. Lubbock, in his book The Origin of Civilization, traces back the behaviour of the mother-in-law toward the son-in-law to the former ‘marriage by capture’. “As long as the capture of women actually took place, the indignation of the parents was probably serious enough. When nothing but symbols of this form of marriage survived, the indignation of the parents was also symbolized and this custom continued after its origin had been forgotten.” Crawley has found it easy to show how little this tentative explanation agrees with the details of actual observation.
E. B. Tylor thinks that the treatment of the son-in-law on the part of the mother-in-law is nothing more than a form of ‘cutting’ on the part of the woman’s family. The