Segmentation of villages is frequently observed in Indian tribes, and the list below will give many striking instances. It was brought about by over-population, as in the case of Okfúski; and it is probable that then only certain gentes, not a promiscuous lot of citizens, emigrated from a town. Other causes for emigration were the exhaustion of the cultivated lands by many successive crops, as well as the need of new and extensive hunting grounds. These they could not obtain in their nearest neighborhood without warring with their proprietors, and therefore often repaired to distant countries to seek new homes (Bartram, Travels, p. 389). The frequent removals of towns to new sites, lying at _short_ distances only, may be easily explained by the unhealthiness of the old site, produced by the constant accumulation of refuse and filth around the towns, which never had anything like sewers or efficient regulations of sanitary police.