Latitude by observation 30 degrees 59 minutes 54 seconds; longitude 118 degrees 17 minutes. 13th August. Resumed our course 58 degrees through level gum forest, then a spearwood thicket, then dense underwood and patches of gum forest till 1.25 p.m., when we came to a native well among granite rocks; having watered the horses, continued the course through the same description of country till 4.40, when we halted at the foot of a granite hill with plenty of rainwater in the hollows and grass on a narrow strip between the scrub and base of the bare rock. Latitude by observation 30 degrees 48 minutes 34 seconds; longitude 118 degrees 40 minutes. 14th August. Started at 10.35 a.m., and steered 41 degrees through a level country, with thickets of underwood, cypress, and gum, with some grassy patches; at 2.20 p.m. reached a bare granite hill, at the foot of which we bivouacked. 15th August. Leaving the bivouac at 7.15 a.m., steered 50 degrees; at 8.50 crossed a steep ridge of white sandy rocks resting on granite; after this the country was grassy, with little timber, 10.30, when we entered a thick scrub; at 11.0 observed a high granite hill bearing 50 degrees, steered for it, and reached the summit at 12.55 p.m., descending into thick scrub on the other side. Having climbed a tree to get a view, observed a very remarkable peak and range of rugged hills distant about forty miles, the highest point bearing 57 degrees; at 2.30 came to scrubby country with only a few trees, and at 4.15 camped at a small waterhole in a granite rock. Latitude by observation 30 degrees 31 minutes 43 seconds; longitude 118 degrees 52 minutes. 16th August. At 7.15 a.m. resumed our march on a bearing 68 degrees, through well-wooded country till 9.35, when we ascended a fine grassy hill of trap-rock. From this hill several of a similar character were visible to the southward, while to the north numerous large dry salt lakes or marshes occupied the valley along the south-eastern declivity of which we had travelled for the last two days; the course was then 56 degrees, through scattered forest, with much underwood and a little grass. At noon struck the shore of one of the lakes, the bank being composed of gypsum and red sand, in some parts twenty feet high; following the shore of the lake to the east till 1.15 p.m., again resumed a course 56 degrees through dense thickets of wattle (acacia), with patches of gum forest and cypress, the soil a red sandy loam devoid of smaller vegetation; at 5.0 halted for the night. Latitude by observation 30 degrees 21 minutes 40 seconds; longitude 119 degrees 11 minutes. WHIRLWINDS. RED SAND. 17th August.