It was a cheerless encampment after so fatiguing a march; but there was at least no more fear of scarcity of water, for the well had an abundant supply. No name could be more appropriate to this place than el Hasi (the well). There is no need of any discriminating surname; it is “the Well”—the well where the traveller who has successfully crossed the Hammáda may be sure to quench his own thirst and that of his animals. But it is not a cheerful resting-place, though it is the great watering- place on this desert road, as he has to cross the fearful “burning plain” of the Hammáda before he reaches the spot.[51] There are several wells hereabouts, which might easily supply with water the largest caravan in an hour’s time; for the water is always bubbling up, and keeps the same level. The well at the side of which we had encamped is rather narrow and deep, and therefore inconvenient for a large party; but it is, though slightly, protected by the ruins around against the wind, which is often very troublesome, and was particularly so on the evening of our arrival. Formerly there was here a sort of fortified khan, such as is very rarely seen in these parts, built by the tribes of the Notmán and Swaíd[52], in order to protect their caravans against the pillaging parties of the Urfílla, originally a Berber tribe. This building consisted of simple chambers, twenty, as it seems, in number, lying round an oval court which has entrances from north and south. It is thirty paces long by sixteen wide, the centre being occupied by the well, which, as it is dug in the sandy soil, bears the general name Hasi. It has a depth of five fathoms; and its temperature was found to be 71⅗° Fahr. The quality of the water, in comparison with that of Taboníye, was very good. The elevation of this place was found by Overweg to be 696 feet; so that we had descended from the highest point of the Hammáda 742 feet. [Illustration: Drawn by J. M. Bernatz, from a Sketch by Dr. Barth. M. & N. Hanhart, lith. et impt. EL HASI. April 23rd. 1850.]