Doubtless, the European traveller cannot easily traverse vast extents of countries, which are either destitute of inhabitants, or are peopled only with ferocious tribes; and this is more especially true with regard to Africa. But there is nothing to prevent the animals themselves from roaming over these countries in all directions, and penetrating to the coasts. Even when there may be great chains of mountains between the coasts and the deserts of the interior, they must always be broken in some places to allow the rivers to pass through; and, in these burning deserts, the quadrupeds naturally follow the banks of rivers. The inhabitants of the coasts also ascend these rivers, and soon become acquainted with all the remarkable species which exist even to their sources, either from personal observation, or by means of intercourse with the inhabitants of the interior. At no period, therefore, could civilized nations have frequented the coast of a large country for any considerable length of time, without gaining some tolerable knowledge of such of the animals which it contained as were remarkable for their size or configuration. This reasoning is confirmed by well known facts. Although the ancients never passed the mountains of Imaus, or crossed the Ganges, in Asia; and, although they never penetrated very far beyond Mount Atlas, in Africa; yet were they, in reality, acquainted with all the large animals of these two divisions of the world; and, if they have not distinguished all the species, it was not because they had not seen them, or heard them spoken of by others, but because the mutual resemblances of some of these species caused them to be confounded together. The only important exception which can be opposed to this assertion, presents itself in the Tapir of Malacca, recently sent home from India by two young naturalists, pupils of mine, Messrs Duvaucel and Diard, and which in fact is one of the most interesting discoveries with which Natural History has been enriched in these latter times. The ancients were perfectly acquainted with the Elephant; and the history of that quadruped is given more accurately by Aristotle than by Buffon. They were not even ignorant of some of the differences which distinguish the elephants of Africa from those of Asia[32]. They knew the two-horned Rhinoceros, which has never been seen alive in modern Europe. Domitian exhibited it at Rome, and had it stamped on his medals, which have been very well described by Pausanias. The one-horned Rhinoceros, distant as was its country, was equally known to them. Pompey shewed one at Rome; and Strabo has accurately described another which he saw at Alexandria[33].