"Upon leaving our depot, near Mount Arden, the low, arid, and sandy nature of the country between the hills and Lake Torrens, compelled us to follow close under the continuation of Flinders range. Here our progress was necessarily very slow, from the rugged nature of the country, the scarcity of water, and the great difficulty both of finding and obtaining access to it. As we advanced, the hills inclined considerably to the eastward, gradually becoming less elevated, until, in latitude 29 degrees 20 minutes S., they ceased altogether, and we found ourselves in a very low and level country, consisting of large stony plains, varied occasionally by sand; and the whole having evidently been subject to recent and extensive inundation. These plains are destitute of water, grass, and timber, and have only a few salsolaceous plants growing upon them; whilst their surface, whether stony or sandy, is quite smooth and even, as if washed so by the action of the water. Throughout this level tract of country were interspersed, in various directions, many small flat-topped elevations, varying in height from 50 to 300 feet, and almost invariably exhibiting precipitous banks. These elevations are composed almost wholly of a chalky substance, coated over on the upper surface by stones, or a sandy soil, and present the appearance of having formed a table land that has been washed to pieces by the violent action of water, and of which these fragments now only remain. Upon forcing a way through this dreary region, in three different directions, I found that the whole of the low country round the termination of Flinders range, was completely surrounded by Lake Torrens, which, commencing not far from the head of Spencer's Gulf, takes a circuitous course of fully 400 miles, of an apparent breadth of from twenty to thirty miles, following the sweep of Flinders range, and almost encircling it in the form of a horse shoe.