The great stream of emigration must have left all Melanesia to the south, and have separated into three branches. One would arrive at the Samoa Islands, another at the Tonga Islands, and a third at the Fiji Islands. The two first archipelagos were evidently uninhabited, the latter already possessed by a black population. An alliance was at first made, however, between the aborigines and the emigrants, but before long the _war of races_ broke out, the Malays were expelled, probably leaving behind them some of their women. In this manner the mixed character of the Fijian population was produced, with which all travellers have been struck. The ejected Malays gained the Tonga Islands. Finding them occupied by fellow-countrymen they attacked and defeated them. Instead of massacring or enslaving them they invented _serfdom_, an institution which has only been met with in this archipelago. Whilst the Malay colonies founded in the Fiji and Tonga Islands were dispersed and desolated by a fratricidal war, those in the Samoan archipelago prospered. The population became denser: the spirit of adventure was not as yet extinguished, fresh emigrations took to the sea, advancing in the direction which had led to the first discoveries. At this period the island of Savaï played an important part, according to the universal testimony of Polynesian traditions. Its name appears in almost all the archipelagos, scarcely modified by local dialects, in the Sandwich Islands and in New Zealand, in the Marquesas Islands as well as in Tahiti, and as far as the Manaïa Islands. Finally, Tupaïa, in drawing the curious map, which has been preserved by Forster, designates Savaï as the mother of all the others, and represents it as much larger than Tahiti. This is an error, but this very error proves beyond a doubt the importance of this locality from our present point of view. With the exception of a single emigration, which passed directly from Tonga to the Marquesas Islands, it is from the Samoan archipelago, and from Savaï in particular, that all the great expeditions appear to have started, which formed secondary centres elsewhere. Tahiti and the Manaïa Islands are the two principal. The former peopled the north of the Pomotous and part of the Marquesas, which, in turn, sent out colonists to the Sandwich Islands, where, however, they had been preceded by the Tahitians. The latter, in which there were both Tahitians and Samoans, pushed their colonies as far as Rapa, to the Gambier Islands, to the south-east extremity of Polynesia and to New Zealand in the south-west.