more than the dry bed of a mountain torrent, along whose borders a little withered vegetation furnishes the hardy camel with pasture, and where a scanty supply of brackish water can, by laborious digging, be obtained. Overhead glitters a sky of brass, unflecked by a single cloud, and, morning and evening, the rays of the sun, mellowed and refracted by the vapors of the earth, clothe every elevation with scarlet, azure, and violet tints which, blended in exquisite harmony, rival the splendors of the rainbow; developing, under the effects of radiation, optical illusions and charming pictures of the mirage, attributed by superstitious ignorance to the influence of enchantment. The unbroken stillness of the Desert, the wide expanse of uninhabited territory, produce a sense of mental depression, accompanied by an apprehension of danger from the convulsions of nature and the violence of man, which no experience seems able to remove; affecting even the sturdy camel-driver, familiar with these solitudes from childhood, who shudders as he urges his string of panting beasts over the drifted sand-heaps and through the mountain fastness, the reputed haunt of evil genii and the vantage ground from whence the murderous banditti oft beset the caravan. So deeply-rooted and tenacious is this feeling that the Arab regards a journey successfully performed as just cause for congratulation, and indeed not inferior to a triumph, as is indicated by his familiar proverb, “Travel is a victory.” The modern geographical division of Arabia into The Stony, The Desert, The Happy is arbitrary, and unknown to the people the boundaries of whose country it purports to establish. The distinctions between the various tribes of the Peninsula have always been determined by mode of life, habits, and tradition rather than by the accident of locality; have been, in fact, rather personal than territorial. This peculiarity is the result of an extraordinary persistence of a national type which neither a new physical environment, nor the change of political and economic conditions, nor the lapse of centuries has been able to modify sensibly, still less to eradicate completely. Hence has arisen the division of the Arabian people into two classes, nomadic and sedentary, the only one universally recognized by them, and whose line of demarcation has always been sharply defined.