On the 10th, we passed through a country that differed in no material point from that already described. We stopped at 10 a.m. under some brush, in the centre of a large plain, from which Arbuthnot's range bore S. 84 E. distant from 50 to 55 miles, and afterwards traversed or rather crossed, those extensive tracts described by Mr. Evans as being under water and covered with reeds, in 1817. They now bore a very different appearance, being firm and dry. The soil was in general good, and covered with forest grass and a species of oxalia. We did not observe any reeds, or the signs of inundation, but, as is invariably the case with plains in the interior, they were of too even surface, as I have so lately remarked, to admit of the waters running quickly off them; and no doubt, when they became saturated, many quagmires are formed, that would very much impede the movements of an expedition.
We reached the Castlereagh about 4 p.m., and although its channel could not have been less than 130 yards in breadth, there was apparently not a drop of water in it. Its bed consisted of pure sand and reeds; amid the latter,
we found a small pond of 15 yards circumference, after a long search. There is a considerable dip in the country towards the river, at about two miles from it; and the intervening brush was full of kangaroo, which, I fancy, had congregated to a spot where there was abundance of food for them. The soil covering the space was of the richest quality, and the timber upon it consisted of box, mountain gum, and the angophora lanceolata, a tree that is never found except on rich ground.
It appeared that our troubles were to recommence, and that in order to continue on the Castlereagh, it would be necessary for Mr. Hume and myself to undertake those fatiguing journeys in search of water that had so exhausted us already: and after all, it was doubtful how soon we might be forced back. I had certainly expected that, on our gaining the banks of the river, we should have had a constant supply of water, but the circumstance of the Castlereagh having not only ceased to flow, but being absolutely dry, while it afforded the best and clearest proof of the severity and continuance of the drought in the interior, at the same time damped the spirits and ardour of the men. We kept the left bank of the river as we proceeded down it, and passed two or three larger ponds about a mile below where we had slept, but there they ceased. The bed of the river became one of pure sand, nor did there appear to be any chance of our finding any water in it. I stopped the party at about eight miles, and desired the men to get their dinners, to give Mr. Hume and myself time
to search for a supply upon the plains. Disappointed to the left, we crossed the channel of the Castlereagh, and struck over a small plain upon the right bank, and at the extremity of it, came upon a swamp, from which we immediately returned for the cattle, and got them unloaded by seven o'clock. As there was sufficient pasture around us, I proposed to Mr. Hume on the following day, to leave the party stationary, and to ride down the river to see how far its present appearances continued. Like the generality of rivers of the interior, it had, where we struck upon it, outer banks to confine its waters during floods, and to prevent them from spreading generally over the country; the space between the two banks being of the richest soil, and the timber chiefly of the angophora kind. Flooded-gum overhung the inner banks of the river, or grew upon the many islands, with casuarina. It became evident, however, that the outer banks declined in height as we proceeded down the river, nor was it long before they ceased altogether. As we rode along, we found that the inner ones were fast decreasing in height also. Riding under a hanging wood of the angophora, which had ceased for a time, we were induced to break off to our right, to examine some large flooded-gum trees about a couple of miles to the N.W. of us. On arriving near them, we were astonished to find that they concealed a serpentine lagoon that had a belt of reeds round it. Keeping this lagoon upon our right, we at length came to the head of it, past which the river sweeps. Crossing the channel of the river, we continued to ride in an easterly di
rection to examine the country. In doing this, we struck on a second branch of the Castlereagh, leading W. by N. into a plain, which it of course inundates at times, and running up it, we found its bed at the point of separation, to be considerably higher than that of the main channel, which still continued of pure sand—and was stamped all over with the prints of the feet of natives, kangaroos, emus, and wild dogs, We then turned again to the head of the lagoon, and took the following bearings of Arbuthnot's range:
| Mount Exmouth . . | E. 90 S. |
| Centre Range . . | E. 35 E. |
| Vernon's Peak . . | E. 20 S. |
From the head of the lagoon, the river appeared to enter a reedy hollow, shaded by a long line of flooded gum trees, and on proceeding to it, we found the banks ceased here altogether; and that a very considerable plain extended both to the right and the left, which cannot fail of being frequently laid under water.
On the following morning we moved the party to the lagoon, and, passing its head, encamped to the north of it; after which we again rode down the river in search of water. It continued to hold a straight and northerly course for about five miles, having a plain on either side. The reeds that had previously covered the channel then suddenly ceased, and the channel, contracting in breadth, gained in depth: it became extremely serpentine, and at length lost all the character and appearance of a river. It
had many back channels, as large as the main one, serving to overflow the neighbouring country. We succeeded in finding a small pond of water in one of the former, hardly large enough to supply our necessities, but as it enabled us to push so much further on, we turned towards the lagoon, making a circuitous journey to the right, across a large plain, bounded to the north by low acacia brush and box. We struck upon a creek at the further extremity of the plain, in which there was a tolerably sized pond. It appeared from the traces of men, that some natives had been there the day before; but we did not see any of them. The water was extremely muddy and unfit for use. The lagoon at which we had encamped, was of less importance than we had imagined.