On the 21st, we set out from Rashid at two o'clock in the morning, and at a little past eight arrived at Imhanzara, having gone mostly N. W. to north and by west. This, too, is a station of the Arabs Daveina; and there had been here large pools of water, the cavities, apparently dug by the hands of men, were from twenty to thirty feet deep, and not less than sixty yards long. The water was just then drying up; and stood only about half a foot in depth, in the bottom of one of the pools. The borders of the basons were thick set with acacia and jujeb-trees; but the fruit of the latter was drying upon the stones, and had fallen shrivelled in great quantities upon the ground. We gathered about a couple of pecks, which was a very great refreshment to us. The fruit, though retaining a very sharp acid taste, is mixed with a sweetness not unlike the tamarind; and which it communicated to water, upon a handful of the dry fruit being steeped therein for half an hour. The ordinary jujeb in Barbary is oblong like an olive; this is perfectly round like the cherry, but something smaller. The tree is thorny, and differs in nothing from the other, but only in the shape of the fruit. When dried, it is of a golden colour; and is here called Nabca, being the principal sustenance of the Arabs, till these pools are dry, when they are obliged to seek other food, and other water, at some more distant station. This day, being the fifth of our journey, we had gone about five hours very diligently, though, considering the weak state we were in, I do not think we advanced more than seven or eight miles; and it was to me very visible, that all the animals, mules, camels, and horses, were affected as much as we were by the simoom. They drank repeatedly, and for a considerable length of time, but they seemed to go just so much the worse for it.