Having given our horses water, we buried twelve gallons against our return, and sending back the man with the cart, and extra horses, the native boy and I still pushed on to the N.W., taking a pack-horse to carry our provisions and a few quarts of water for ourselves.
As we proceeded, the country changed to extensive plains and undulations of stones and gravel, washed perfectly level by water, and with the stones as even in size and as regularly laid as if they had been picked out and laid by a paviour.

At intervals were interspersed many of the fragments of table land I have alluded to before, only perhaps a little less elevated than they had previously been; we passed also the beds of several small dry watercourses, and encamped upon one of the largest, long after dark, having travelled twenty-five miles since we left the cart, and having made in the whole a day's journey of thirty-seven miles.
There was tolerable food in the bed of the watercourse, but the horses were thirsty and eat but little.

Unfortunately, in crossing the stony ground, one of them cast a shoe, and began to go a little lame.
August 14 .-- Moving away very early we travelled sixteen miles due north, through a very similar country, only that the stones and gravel in the plains had become much finer and a good deal mixed with sand; the fragments of table land still continued in every direction at intervals, and their elevations still varied from 50 to 300 feet.

In the upper part these elevations appeared red from the red sandy soil, gravel, or iron-stone grit which were generally found upon their summits.

They had all steep precipitous sides, which looked very white in the distance, and were composed of a chalky substance, traversed by veins of very beautiful gypsum.