There was a small pitch-well an hour away to the south-east, and if springs that burn when the tinder touches them are more logical than spirits that issue from a bottle when the seal is broken, then the explanation of Fawwâz may be accepted. But at that moment I could not stay to think the problem out, for if it was hot riding, sitting still was intolerable, and we were not anxious to linger when every half-hour’s march meant half-an-hour of dangerous country behind us. From noon to sunset the desert is stripped of beauty. Hour after hour we journeyed on, while the bare forbidding hills drew away from us on the right, and the plain ahead rolled out illimitable. We saw no living creature, man or beast, but an hour from ’Ain el ’As[.]fûrîyeh, where we had lunched, we came upon a deep still pool in an outcrop of rock, the water sufficiently sweet to drink. This spot is called Jelîb esh Sheikh; it contains several such pools, said Fawwâz, and he added that the water had appeared there of a sudden two years before, but that now it never diminished, nor rose higher in the rocky clefts. Just beyond the pool we crossed the Wâdî Muḥammadî, which stretched westwards to the receding ridges of the Gar’at ej Jemâl, and east to the Euphrates; it was dry and blotched with an evil-looking crust of sulphur. Fawwâz turned his camel’s head a little to the east of south and began to look anxiously for landmarks. We hoped to find at Abu Jîr an encampment of the Deleim, and, eagerly as we wished to avoid the scattered horsemen of the tribe by day, it was essential that we should pass the night near their tents. The desert is governed by old and well-defined laws, and the first of these is the law of hospitality. If we slept within the circuit of a sheikh’s encampment he would be “malzûm ’aleinâ” (responsible for us) and not one of his people would touch us; but if we lay out in the open we should court the attack of raiders and of thieves. Two hours from the Wâdî Muḥammadî we reached a little tell, from the top of which we sighted the ’alâmah (the landmarks) of Abu Jîr, a couple of high-piled mounds of stones. An hour later they lay to the east of us, and we saw still farther to the south-east the black line of tamarisk bushes that indicated the oasis. But it was another hour before we got up to it, and the sun was very low in the sky when we set foot on the hard black surface that gives the place its name. There was no time to lose, and we embarked recklessly on the “Father of Asphalt,” only to be caught in the fresh pitch that had been spread out upon the wilderness by streams of sulphurous water. We dismounted and led our animals over the quaking expanse, coasting round the head-waters of the springs--there are, I believe, eight of them--and experimenting in our own persons on half-congealed lakes of pitch before we allowed the camels to venture across them. The light faded while we were thus engaged, and seeing that