Near the flat on which we stopped on the evening of the 2nd there was a hill considerably elevated above the others; which, after unsaddling and letting out the horses, Mr. Browne and I were induced to ascend. From it we saw a line of high and broken ranges to the S.S.W. but they were very distant. At three and a half miles from this point we crossed a salt water creek, having pools in it of great depth, but so clear that we could see to the bottom; and wherever our feet sank in the mud, salt water immediately oozed up. There were some box-trees growing near this creek, which came from the north, and fell towards the ranges. At half a mile further we crossed a small fresh water creek, and intermediate between the two was a lagoon of about a mile in length, but not more than three inches in depth. This lagoon, if it might so be called, from its size only, had been filled by the recent rains; but was so thick and muddy, from being continually ruffled by the winds, that it was unfit for use. The banks of the fresh water creek were crowded with water-hens, similar to those which visited Adelaide in such countless numbers the year before I proceeded into the interior (1843). They were running about like so many fowls; but, on being alarmed, took flight and went south.
The fresh water creek (across which it was an easy jump) joined the salt water creek a little below where we struck it, and was the first creek of the kind we had seen since we left the Depot, in a distance of more than 100 miles, and up to this point we had entirely subsisted on the surface water left by the rains. The country we now passed through was of a salsolaceous character, like a low barren sea coast. The sand hills were lower and broader than they had been, and their sides were cut by deep fissures made by heavy torrents. From a hill, about a mile from our halting place on this day, we again saw the ranges, which had been sighted the day before. South of us, and distant about a mile, there was a large dry lagoon, white with salt, and another of a similar kind to the west of it.
These changes in the character of the country convinced me that we should soon arrive at some more important one. On the 4th we advanced as usual on a bearing of 75 degrees to the west of south, having then chained 65 miles upon it. At about three miles we observed a sand hill in front of us, beyond which no land was to be seen, as if the country dipped, and there was a great hollow. On arriving at this sand hill our further progress westward was checked by the intervention of an immense shallow and sandy basin, upon which we looked down from the place where we stood. The hills we had seen the day before were still visible through a good telescope, but we could only distinguish their outlines; in addition to them, however, there was a nearer flattopped range, more to the northward and westward of the main range, which latter still bore S.S.W., and appeared to belong to a high and broken chain of mountains. The sandy basin was from ten to twelve miles broad, but destitute of water opposite to us, although there were, both to the southward and northward, sheets of water as blue as indigo and as salt as brine. These detached sheets were fringed round with samphire bushes with which the basin was also speckled over. There was a gradual descent of about a mile and a half, to the margin of the basin, the intervening ground being covered with low scrub. My first object was, to ascertain if we could cross this feature, which extended southwards beyond the range of vision, but turned to the westward in a northerly direction, in the shape in which Mr. Eyre has laid Lake Torrens down. For this purpose Mr. Browne and I descended into it. The bed was composed of sand and clay, the latter lying in large masses, and deeply grooved by torrents of rain. There was not any great quantity of salt to be seen, but it was collected at the bottom of gutters, and, no doubt, was more or less mixed with the soil. At about four miles we were obliged to dismount; and, tying our horses so as to secure them, walked on for another mile, when we found the ground too soft for our weight and were obliged to return; and, as it was now late, we commenced a search for water, and having found a small supply in a little hollow, at a short distance from the flag, we went to it and encamped. The length of the chain line to the flag staff was 70 3/4 miles, which with the 61 we had measured from the Depot, made 131 3/4 miles in all; the direct distance, therefore, from the Depot to the flag staff, was about 115 miles, on a bearing of 9 1/2 degrees to the North of West or W. 3/4 N.
My object in the journey I had thus undertaken, was not so much to measure the distance between the two places, as to ascertain if the country to the north-west of Lake Torrens, on the borders of which I presumed I had arrived, was practicable or not, and whether it was connected with any more central body of water. It behoved me to ascertain these two points with as little delay as possible, for the surface water was fast drying up, and we were in danger of having our retreat cut off. Whether the country was practicable or not, in the direction I was anxious to take, it was clear that I could not have penetrated as far as I then was, with the heavy drays, with any prudence.
To be more satisfied, however, as to the nature of the country to the westward, I rode towards the N.E. angle of the Sandy Basin, on the morning of the 4th, sending Mr. Stuart southwards, to examine it in that direction; but, neither of these journeys proving satisfactory, I determined on fixing the position of the hills in reference to our chained line, and then return to the Depot, to prepare for a more extensive exploration of the N.W. interior. I found the country perfectly impracticable to the N.W., and that it was impossible to ascertain the real character of this Sandy Basin. On the other side of it the country appeared to be wooded; beyond the wood there was a sudden fall; and, as far as I could judge, this singular feature must have been connected with Spencer's Gulf, before the passage that evidently existed once between them, was filled up.
On the 5th I ran a base line from the end of the chained line to the north-west, on a bearing of 317 degrees, to the only prominent sand hill in that direction, distant from the staff 5 1/2 miles, from the extremities of which the ranges bore as follow:--
BEARINGS FROM THE FLAG STAFF AT THE TERMINATION OF THE CHAINED LINE.
To a bluff point in the main range 198.00
To the north point of the south range 188.40
To the north point 182.50
To the highest point in south range 187.00
To the flat-topped hills 231.00
To the north-west point of the lake 283.00
To the south point 158.00
BEARINGS FROM THE NORTH-WEST EXTREMITY.
To the bluff 194.30
To the north point of south range 184.00
To the south 183.00
To the flat-topped hills 176.30
To the north-west extremity of lake 275.00
The angles given by these bearings were necessarily very acute, but that could not be avoided. With the bearings, however, from a point in our chain line, 16 miles to the rear, they gave the distance of the more distant ranges as 65 miles, that of the nearer ones as 33.
Our latitude, by altitudes of Vega and Altair, on the night of the 5th of August, was 29 degrees 14 minutes 39 seconds, and 29 degrees 15 minutes 14 seconds; by our bearings, therefore, the flat-topped hills were in lat. 29 degrees 33 minutes, and the bluff, in the centre of the distant chain, where there appeared to be a break in it, in 30 degrees 10 minutes, and in long. 139 degrees 12 minutes.