From this and analogous instances it is evident that, admirable as the scheme of government seems to have been as a means of laying the foundations of civilization, and of teaching primitive people agriculture, stability, law and order, yet the very features which rendered it so efficient at first became, eventually, the cause of its gradual disintegration, as soon as a certain degree of culture prosperity was attained by the community. One mode of avoiding the evils of over-population and of ridding the capital of its restless, and enterprising or troublesome members, was the system of Mitimaes or colonists. This merits particular attention, because it formed an integral part of the marvellous and widespread scheme of organization we have been studying, and therefore helps to an understanding of the customary means by which civilization was spread in past ages throughout the American continent. As the population of Cuzco increased and greater food supplies were found necessary, the Incas extended their dominions by a series of conquests. “As soon as they had made themselves lords of a province they left Mitimaes or settlers there, who caused the natives to live in communities” and established a small centre of local government on the pattern of Cuzco. Mitimaes or colonists were also sent, from different provinces, to live on the frontiers, bordering on hostile countries, so as to aid in defending them against the enemies. The establishment of colonies in distant districts was therefore a tried and familiar custom of those who possessed the wonderful governmental plan we have been studying. I have shown that the greater the prosperity of a civilized community organized on this plan, the more imperative the necessity of founding new colonies would sometimes become. The urgent need of greater food supplies would lead to the sending out of expeditions for the purpose of surveying the surrounding country and ascertaining the quality of its produce. In his MS. Noticia, Padre Oliva speaks of an exploring party which was sent out by the ancestor of the Incas with the injunction to return in a year. After a few years had passed and none of the party returned, a second expedition was sent out in search of the first and this led to the final establishment of the Inca dominion in a promising region. Sahagun recounts how a Maya colony was established at Panuco; Montezuma himself related to Cortés that he and his lineage were descendants of colonists from distant parts; traditions of culture-heroes who established civilization amongst them abound amongst Central American tribes; finally, Peru is shown to have been civilized by rulers who carried out, systematically, a ready-made plan in a comparatively short time. Whence did all these culture-heroes emanate, carrying the identical method and system into widely separated districts and establishing centres of civilization in the richest and most fertile parts of the American Continent?