Perhaps no other country, not even Switzerland, has been so well protected by nature against the assaults--military, economic or religious--of the outside world. Before the seventh century, the fury of the Roman legions and the enthusiasm of martial Christians had been expended in prodigious but wholly futile efforts to subjugate her: the one because its soldiers died of heat and thirst in her almost uninhabitable interior, and the other because its votaries too often restricted their religious zeal to a general consumption of alcohol and to an individual union with more than one wife or concubine. But in any case, inasmuch as the Arabs were fierce and warlike by nature, and were acquainted with such refinements of wine and concupiscence as even the most aspiring Christians had not achieved, the attacks of Pagan Rome and Christian Palestine would probably have come to naught. Even to this day, indeed, Arabia has been left almost entirely alone by the outside world. Timeless, changeless and unromantic save to the capricious imagination of poets and travelers, her interminable, ocean-like billows of arid sand have saved her from all conquests. As she was in the dim and remote beginnings of history, so she largely remains; and the modern wanderer who penetrates her obscure interior cannot be certain whether he will be greeted with affluent hospitality or a frowning hostility that may prove inimical to life itself. A land of contrasts! Three-fourths surrounded by water, her extensive interior is a scorched and stony desert; her verdant southern coasts are soon lost in a lifeless and almost level plateau; her abundantly fertile province of Yemen, known to romance as Araby the Blest, fades northward into the ominous wastes of Nejd, or Arabia Deserta, and northwestward into the precipitous wilds of Hejaz, or Arabia Petræa. Short rivers hurl their jagged torrents down her sloping sides, while prolific oases, always placid and unruffled, dot her deserts. The fragrant breezes that come from the Indian Ocean are quickly assimilated into the stagnant, oppressive atmosphere of her centre; her palmy springs may teem with sweet and pure waters, or with saline, sulphurous scum. The broiling rays of the midday sun give way nightly to bitter and frosty dews; her long-slumbering sands are at times whirled violently aloft by sharp, sudden, blinding storms that often overwhelm caravans and tents, to subside as suddenly, leaving her surface forever different--and yet forever the same. A land untouched by time, where time’s oppression is yet most powerfully felt; a land that never alters, though perpetually subject to alteration; a land where the new is eternally old, and the old is eternally new.