only possesses this virtue if the nuts have been gathered on a Friday by a youth who has never known a woman, and if the oil has been extracted by a pure maiden, while a priest recited the appropriate spells.(661) So in the Marquesas Islands, when a woman was making coco-nut oil, she was tabooed for four or five or more days, during which she might have no intercourse with her husband. If she broke this rule, it was believed that she would obtain no oil.(662) In the same islands when a man had placed a dish of bananas and coco-nuts in an oven of hot stones to bake over night, he might not go in to his wife, or the food would not be found baked in the morning.(663) In ancient Mexico the men who distilled the wine known as _pulque_ from the sap of the great aloe, might not touch a woman for four days; if they were unchaste, they thought the wine would be sour and putrid.(664) (M124) Among the Ba-Pedi and Ba-thonga tribes of South Africa, when the site of a new village has been chosen and the houses are building, all the married people are forbidden to have conjugal relations with each other. If it were discovered that any couple had broken this rule, the work of building would immediately be stopped, and another site chosen for the village. For they think that a breach of chastity would spoil the village which was growing up, that the chief would grow lean and perhaps die, and that the guilty woman would never bear another child.(665) Among the Chams of Cochin-China, when a dam is made or repaired on a river for the sake of irrigation, the chief who offers the traditional sacrifices and implores the protection of the deities on the work, has to stay all the time in a wretched hovel of straw, taking no part in the labour, and observing the strictest continence; for the people believe that a breach of his chastity would entail a breach of the dam.(666) Here, it is plain, there can be no idea of maintaining the mere bodily vigour of the chief for the accomplishment of a task in which he does not even bear a hand. In New Caledonia the wizard who performs certain superstitious ceremonies at the building and launching of a large canoe is bound to the most rigorous chastity the whole time that the vessel is on the stocks.(667) Among the natives of the Gazelle Peninsula in New Britain men who are engaged in making fish-traps avoid women and observe strict continence. They believe that if a woman were even to touch a fish-trap, it would catch nothing.(668) Here, therefore, the rule of continence probably springs from a fear of infecting sympathetically the traps with feminine weakness or perhaps with menstrual pollution. Every year at the end of September or the beginning of October, when the north-east monsoon is near an end, a fleet of large sailing canoes leaves Port Moresby and the neighbouring Motu villages of New Guinea on a trading voyage to the deltas of the rivers which flow into the Papuan Gulf. The canoes are laden with a cargo