Appendix
endeavoured to confine myself to such as rest on sure historic grounds; and not so much to offer my own opinion, as to enable him to form one for himself. There are some material embarrassments in the way to this, however, which must not be passed over in silence. These consist, not in explaining the fact, that, while the mythic system and the science of the Aztecs afford some striking points of analogy with the Asiatic, they should differ in so many more; for the same phenomenon is found among the nations of the Old World, who seem to have borrowed from one another those ideas only which were best suited to their peculiar genius and institutions. Nor does the difficulty lie in accounting for the great dissimilarity of the American languages to those in the other hemisphere; for the difference with these is not greater than what exists among themselves; and no one will contend for a separate origin for each of the aboriginal tribes.1 But it is scarcely possible to reconcile the knowledge of Oriental science with the total ignorance of some of the most serviceable and familiar arts, as the use of milk, and of iron, for example; arts so simple, yet so important to domestic comfort, that, when once acquired, they could hardly be lost.
The Aztecs had no domesticated animals whatever. And we have seen that they employed bronze as a substitute for iron, for all mechanical purposes. The bison, or wild cow, of America, however, which ranges in countless herds over the magnificent prairies of the west, yields milk like the tame animal of the same species, in Asia and Europe;2 and iron was scattered in large masses over the surface of the tableland. Yet there have been people considerably civilised in Eastern Asia, who were almost equally strangers to the use of milk.3 The buffalo range was not so much on the western coast, as on the eastern slopes of the Rocky Mountains;4 and the migratory Aztec might well doubt, whether the wild, uncouth monsters, whom he occasionally saw bounding with such fury over the distant plains, were capable of domestication, like the meek animals which he had left grazing in the green pastures of Asia. Iron, too, though met with on the surface of the ground, was more tenacious, and harder to work, than copper, which he also found in much greater quantities on his route. It is possible, moreover, that his migration may have been previous to the time when iron was used by his nation; for we have seen more than one people in the Old World employing bronze and copper, with entire ignorance, apparently, of any more serviceable
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