Latitude by Canopus and Pollux 19 degrees 51 seconds 12 minutes.
3rd March.
At 5.30 a.m. started and followed the creek on a general course south-west. There was a very irregular channel sometimes ten yards wide and very shallow, and then expanding into pools fifty yards wide. The sandy plain encroached much on the grassy flats, and reduced the winter course of the creek to half a mile in breadth. At 8.0 the course was changed to south, and at 10.15 camped at a swamp, which was nearly dry, and covered with beautiful grass. The country differed in character from that seen yesterday, there being a few scattered white-gum trees and patches of tall acacia. Salsola and salicornia are also very abundant, and show the saline nature of the soil.
Latitude by Canopus and Pollux 20 degrees 2 minutes 10 seconds.
SALT LAKES.
4th March.
Left the camp at 5.50 a.m., and steered south-west over a very level country, with shallow hollows filled with a dense growth of acacia, and at 7.30 struck the creek with a sandy channel and narrow flats, covered with salsola and salicornia. The pools were very shallow, and gradually became salt, and at 10.15 it spread into the dry bed of a salt lake more than a mile in diameter. This was connected by a broad channel with a pool of salt-water in it, with a second dry salt lake eight miles in diameter. As there was little prospect of water ahead and the day far advanced, we returned to one of the brackish pools and encamped. The country passed was of a worthless character, and so much impregnated with salt that the surface of the ground is often covered with a thin crust of salt.
Latitude by e Argus 20 degrees 10 minutes 40 seconds.
5th March.
Started from the camp at 5.45 a.m., and steered south-south-east through the acacia wood to the lake, and then south by east across the dry bed of the lake towards a break in the trees on the southern side. Here we found a creek joining the lake from the south-west, in which there were some shallow pools. We then steered east, to intersect any channel by which the waters of the lake might flow to the south or south-east, and passing through a wood of acacia entered the sandy desert. As some low rocky hills were visible to the east we steered for them. At 2.10 halted half a mile from the hills, and then ascended them on foot. They were very barren and rocky, scarcely eighty feet above the plain, formed of sandstone, the strata horizontal. From the summit of the hill nothing was visible but one unbounded waste of sandy ridges and low rocky hillocks, which lay to the south-east of the hill. All was one impenetrable desert, as the flat and sandy surface, which could absorb the waters of the creek, was not likely to originate watercourses. Descending the hill, which I named Mount Wilson, after the geologist attached to the expedition, we returned towards the creek at the south end of the lake, reaching it at 9.30.