[Sidenote: Similar beliefs and customs among the tribes of Dutch Borneo.] The foregoing accounts refer especially to the tribes of Borneo under British rule; but similar ideas and customs prevail among the kindred tribes of Dutch Borneo. Thus the Kayans or Bahaus in the interior of the island believe that adultery is punished by the spirits, who visit the whole tribe with failure of the crops and other misfortunes. Hence in order to avert these evil consequences from the innocent members of the tribe, the two culprits, with all their possessions, are first placed on a gravel bank in the middle of the river, in order to isolate or, in electrical {51} language, to insulate them and so prevent the moral or rather physical infection from spreading. Then pigs and fowls are killed, and with the blood priestesses smear the property of the guilty pair in order to disinfect it. Finally, the two are placed on a raft, with sixteen eggs, and allowed to drift down stream. They may save themselves by plunging into the water and swimming ashore; but this is perhaps a mitigation of an older sentence of death by drowning, for young people still shower long grass stalks, representing spears, at the shamefaced and dripping couple.[51.1] Certain it is, that some Dyak tribes used to punish incest by fastening the man and woman in separate baskets laden with stones and drowning them in the river. By incest they understood the cohabitation of parents with children, of brothers with sisters, and of uncles and aunts with nieces and nephews. A Dutch resident had much difficulty in saving the life of an uncle and niece who had married each other; finally he procured their banishment to a distant part of Borneo.[51.2] The Blu-u Kayans, another tribe in the interior of Borneo, believe that an intrigue between an unmarried pair is punished by the spirits with failure of the harvest, of the fishing, and of the hunt. Hence the delinquents have to appease the wrath of the spirits by sacrificing a pig and a certain quantity of rice.[51.3] In Pasir, a district of Eastern Borneo, incest is thought to bring dearth, epidemics, and all sorts of evils on the land.[51.4] In the island of Ceram a man convicted of unchastity has to smear every house in the village with the blood of a pig and a fowl: this is supposed to wipe out his guilt and ward off misfortunes from the village.[51.5]