But, leaving the estimate of centuries out of consideration, in the researches into the origin of the peculiar native civilisation of America here referred to, the recently deciphered Akkad is accepted as the typical language of the Sumerian class. This is assumed to have started from High Asia, and to have passed on to Babylonia; while another branch diffused itself by India and Indo-China, and thence, by way of the islands of the Pacific, reached America. Hence, in an illustrative table of Sumerian words arranged under four heads, as Western, Indo-Chinese, Peruvian, and Mexican, etc., it is noted that “while in some cases a root may be traced throughout, it will be seen that more commonly the western and American roots or types, cross in the Indo-Chinese region.” But another and older influence, related to the Agaw of the Nile region, is also traced in the Guarani, Omagua, and other languages of South America, indicating evidences of more remote relations with the Old World, and with the African continent. This is supposed to have been displaced by a Sumerian migration by which the Aymara domination was established in Peru, and the Maya element introduced into Yucatan. Those movements are assumed to belong to an era of civilisation, during which the maritime enterprise of the Pacific may have been carried on upon a scale unknown to the most adventurous of modern Malay navigators, notwithstanding the essentially maritime character by which the race is still distinguished. All this implies that the highway to the Pacific was familiar to both continents; and hence a second migration is recognised, in certain linguistic relations, between the Siamese and other languages of Indo-China, and the Quichua and Aztec of Peru and Mexico. But the problem of the origin of the races of the western continent, and of the sources of its native civilisation, is still in that preliminary stage in which the accumulation of materials on which future induction may be based is of more value than the most comprehensive generalisations.