132 THE EMPTY QUARTER man comes hither ever. But perhaps the most epigrammatic of all their utterances on the subject was that of Suwid, which I have placed at the opening of the chapter on the ' Waterless Waste '. That the Badawin of the Great Desert—the Manasir and Murra between them span the whole breadth of its thousand miles from the Oman frontier to Najran—know and use the term c Rub* al Khali' admits of no doubt whatever. Some of the border tribes mentioned by Mr. Thomas may not use the term freely as they probably have active cognisance only of the section to which the term e Al Ramla ' applies, yet I cannot but doubt their wholesale ignorance of the name and its special significance. But God knows best, as the Arabs would say in such case, and I have no hesitation in restoring to the Great South Desert of Arabia the name by which it has been known to the Arabs before and since Shahrazad re- lated to King Shahriyar the tale of the cobbler Ma'ruf, who was transported by supernatural agency into the midst of the Rub' al Kharab1 and anticipated my own discovery of Wabar. I would state the final result of my researches into the matter in the following formula. The whole of the Great South Desert is Rube al Khali in contrast with the inhabited world. A great part of it, commonly frequented by pastoral nomads and containing countless wells, is known to them and their nearer neighbours as Al Ramla or Al Rimal, while a part of the latter containing only briny wells is again sub- divided from it under the name of Al K.hiran and another section with more palatable water is Sanam, another Tuwal and so forth. What remains after subtraction of the waterful area is Rub' al Khali par excellence, the waterless desert, the Empty Quarter—empty even by the reckoning of the Bada- win. The name ' Ahqaf', common enough in literature, I have never heard but on the lips of pedants and pedagogues. It may perhaps be known and used by the Hadhramaut Arabs, of whom I have no experience. I have dealt at some length with an important aspect of a great problem and must return to our marching through the 1 Burton rightly equates this name with, the commoner Bub' al Khali.