What remained for me but to prove, by trial, that what might be perilous to other travellers was safe to me? The "experimentum crucis" was a visit to Al-Hijaz, at once the most difficult and the most dangerous point by which a European can enter Arabia. I had intended, had the period of leave originally applied for been granted, to land at Maskat-a favourable starting-place-and there to apply myself, slowly and surely, to the task of spanning the deserts. But now I was to hurry, in the midst of summer, after a four years' sojourn in Europe, during which many things Oriental had faded away from my memory, and-after passing through the ordeal of Egypt, a country where the police is curious as in Rome or Milan-to begin with the Moslem's Holy Land, the jealously guarded and exclusive Harim. However, being liberally supplied with the means of travel by the Royal Geographical Society; thoroughly tired of "progress" and of "civilisation;" curious to see with my eyes what others are content to "hear with ears," namely, Moslem inner life in a really Mohammedan country; and longing, if truth be told, to set foot on that mysterious spot which no vacation tourist has yet described, measured, sketched and photographed, I resolved to resume my old character of a Persian wanderer,[FN#2] a "Darwaysh," and to make the attempt. [p.3]The principal object with which I started was this: to cross the unknown Arabian Peninsula, in a direct line from either Al-Madinah to Maskat, or diagonally from Meccah to Makallah on the Indian Ocean. By what "Circumstance, the miscreator" my plans were defeated, the reader will discover in the course of these volumes. The secondary objects were numerous. I was desirous to find out if any market for horses could be opened between Central Arabia and India, where the studs were beginning to excite general dissatisfaction; to obtain information concerning the Great Eastern wilderness, the vast expanse marked Rub'a al-Khai (the "Empty Abode") in our maps; to inquire into the hydrography of the Hijaz, its water-shed, the disputed slope of the country, and the existence or non-existence of perennial streams; and finally, to try, by actual observation, the truth of a theory proposed by Colonel W. Sykes, namely, that if tradition be true, in the population of the vast Peninsula there must exist certain physiological differences sufficient to warrant our questioning the common origin of the Arab family. As regards horses, I am satisfied that from the Eastern coast something might be done-nothing on the Western, where the animals, though thorough-bred, are mere "weeds," of a foolish price and procurable only by chance. Of the Rub'a al-Khali I have heard enough, from credible relators, to conclude that its horrid depths swarm with a large and half-starving population; that it abounds in Wadys, valleys, gullies and ravines, partially fertilised by intermittent torrents; and, therefore, that the land is open to the adventurous traveller.