About four in the afternoon, after having drunk the rest of our water, we were again on our way, more thirsty than ever, and proceeding slowly towards the north, in the hope of reaching the wells of Telig by the morning of the 26th. At nine in the evening we stopped for prayer as usual; a Moor who accompanied us gave us each a little water, which we received most gratefully; it relieved us very much. The night was very hot like the preceding. About ten we turned for three miles to the east, along the foot of some high hills of moving sand. On the 26th, at five in the morning, we passed near some large masses of white earth, which looked at a distance like houses in ruins; in this part is found a very fine grey sand. The camels, though laden, lay down to roll themselves, which raised a terrible dust; and the Moors had infinite difficulty in preventing them from doing so. I also observed in this place gravel of the same colour, and further on I found veins of white earth, of the same nature as the masses already mentioned. About three miles to the west we saw some sand-hills, covered with granite, the colour of wine-lees; it is very brittle, and appears to lie in strata three or four feet thick. We travelled the whole morning in an extensive plain, enclosed by these hills; the soil was very hard, covered with rocks and red and black granite, in flaky strata like slate. About eight in the morning, after climbing a high hill, we descended into a sort of basin formed by hills of red granite; the chain extends from east to west; the highest point that we passed over was three or four hundred feet high. In this valley, the soil of which is composed of coarse yellow sand, are the wells of Telig. We found these much wished-for wells filled with sand; which the Moors immediately fell to work to clear out; the poor camels which had already become unmanageable, from knowing that they were near water, were then permitted to drink: when they were driven away by the whip, they ran off to a little distance, and came crowding again round the well, ruminating, and laying their heads on the damp sand which had been thrown out of it. The first water we drew up was very black and muddy; but, in spite of the sand which it contained, the camels fought for it with fury. These wells, which afford plenty of brackish water, are not more than three or four feet deep. When the water was fit to drink, I went and thrust my head in amongst the camels to drink with them; a Moor permitted me to drink out of his leather bucket, for we had not stopped to unpack calabashes, which were our usual drinking vessels. To the east of these wells, where the ground is lowest, we saw the ruins of some houses built of bricks of white clay; they are almost buried in the sand which the wind drives over them: further on in the same direction, there is a great deal of white-veined earth like that with which these houses were constructed; it bears some resemblance to lime.