Starting again from here at a very early hour in the night, we reached after a march of about six miles the well of Díbbela, the romantic character of which, with its high sand hills, from which black rocky masses towered forth, together with its dúm-palms, struck me not a little. But the water is abominable, being impregnated with an immense quantity of natron; and it was here that Mr. Henry Warrington, who had accompanied Mr. Vogel to Kúkawa, succumbed to the dysentery with which he had been seized on the road, the bad quality of the water having probably brought the disorder to a crisis. It was, moreover, a very hot day, although not hotter than usual, the thermometer at two o’clock indicating 109° in the best shade I could find; and the masses of sand all around were quite bewitching and bewildering. Starting again in the afternoon as soon as the heat had reached its greatest intensity, we ascended the sandy downs with a considerable westerly deviation, leaving just beyond this hollow another one, with some talha trees, and then keeping over the sandy level with a ridge of the same character, and passing after a march of about five miles a great quantity of kajíji, till after a good stretch of altogether seventeen miles, we encamped on hard sandy ground. On this tedious journey, I always felt greatly delighted on our arrival at the camping-ground, to stretch myself at full length on the clean sand, the softness of which makes one feel in no want of a couch. [Sidenote: June 8th.] Having encamped at a rather late hour, we did not start so early as usual, and halted after a march of about eight miles on a ground almost entirely destitute of herbage, but what seemed very remarkable, soaked by the rain of the previous day, and affording another and still stronger proof of the incorrectness of the opinion which had hitherto been entertained of this whole tract never being fertilized by the rains. The soil also was full of the footprints of the “bagr-el-wáhesh,” _Antelope bubalis_, which being pursued by the sportsmen of Ágadem and Díbbela, had evidently sought a refuge in this region.