Lyon says they are the finest race of men he ever saw, “tall, straight, and handsome, with a certain air of independence and pride, which is very imposing.”[20] If we observe the gradations of color in different localities in the meridian under which we live, we shall perceive a very close relation to the heat of the sun in each respectively. Under the equator we have the deep black of the Negro, then the copper or olive of the Moors of Northern Africa; then the Spaniard and Italian, swarthy, compared with other Europeans; the French, still darker than the English, while the fair and florid complexion of England and Germany passes more northerly into the bleached Scandinavian white.[21] It is well-known, that in whatever region travellers ascend mountains, they find the vegetation at every successive level altering its character, and gradually assuming the appearances presented in more northern countries; thus indicating that the atmosphere, temperature, and physical agencies in general, assimilate, as we approach Alpine regions, to the peculiarities locally connected with high latitudes. If, therefore, complexion and other bodily qualities belonging to races of men, depend upon climate and external conditions, we should expect to find them varying in reference to elevation of surface; and if they should be found actually to undergo such variations, this will be a strong argument that these external characteristics do, in fact, depend upon local conditions. Now, if we inquire respecting the physical characters of the tribes inhabiting high tracts in warm countries, we shall find that they coincide with those which prevail in the level or low parts of more northern tracts. The Swiss, in the high mountains above the plains of Lombardy, have sandy or brown hair. What a contrast presents itself to the traveller who descends into the Milanese territory, where the peasants have black hair and eyes, with strongly-marked Italian, and almost Oriental features. In the higher part of the Biscayan country, instead of the swarthy complexion and black hair of the Castilians, the natives have a fair complexion, with light blue eyes, and flaxen, or auburn hair.[22] In the intertropical region, high elevations of surface, as they produce a cooler climate, occasion the appearance of light complexions. In the higher parts of Senegambia, which front the Atlantic, and are cooled by winds from the Western Ocean, where, in fact, the temperature is known to be moderate, and even cool at times, the light copper-colored Fulahs are found surrounded on every side by black Negro nations inhabiting lower districts; and nearly in the same parallel, but on the opposite coast of Africa, are the high plains of Enared and Kaffa, where the inhabitants are said to be fairer than the inhabitants of Southern Europe.[23]