23D JULY.—The water in the adjacent pond was trodden into mud, so that none remained for the horses and bullocks this morning. Accordingly, on arriving at a pond about two miles on, we gave water to all, that they might better bear the privation in the afternoon, should we not fortunately find more. The river had a singular tendency to spread into little channels within a belt of brigalow scrub. The little holes formed by these channels were almost all dry, while the withered state of the grass, and even of the forest trees, showed that rain had long been due, and we therefore hoped some would fall before our return. When we had travelled about twelve miles, keeping as close to the river line as the scrub would permit, and crossing one or two fine rising grounds covered with a very open forest, and consisting of large gravel, I found a pond, and encamped near it, on a plain of almost naked clay. Amongst the water-worn pebbles, of which the rising ground consisted, there were, besides the ingredients of the Barwan gravel, many of trap and basalt. Very old and dry grass only, could be had for the cattle. In the pond were small fishes of a different form from any we had seen, having a large forked tail, only two or three spikes in the dorsal fin, and a large jet-black eye within a broad silvery ring. Mr. Stephenson found three crabs, apparently identical with those about the inlets near Sydney. Latitude, 23° 37' 51". S. Thermometer, at sunrise, 46°; at noon, 73°; at 4 p.m. 80; at 9, 55°. (LV.)
24TH JULY.—The morning was overcast by heavy clouds, and the air was balmy and mild, reminding us of the spring season near Sydney. Lightning had been seen to the northward during the night. In following the little wayward channel downward, we met with much brigalow scrub, and crossed two apparently important tributaries. In one of them was a good large pond. We had some trouble with an ana-branch, resembling the main channel, which we had twice to cross at a distance of two miles. With the last tributaries, plains and an open forest country became neighbours to the river; and where we encamped beside it, no scrub was to be seen, and the water lay in a deep broad reach, nearly half a mile in length, with ducks upon it. Towards evening, the unwonted sound of thunder was heard in the west, reminding us, at this season of the year, that we were near the Tropic. In the same direction, two distant storms exhausted themselves, and most likely giving birth to young grass where they fell. During the night, much thunder was heard, and also early next morning, to the northward. Latitude, 23° 31' S. Thermometer, at sunrise, 56°; at noon, 75°; at 4, p.m., 82°; at 9, 66°. (LVI.)
25TH JULY.—There was no hill or other geographical feature near our route, whereby it might have been possible to mark there the limit of Tropical Australia. We were the first to enter the interior beyond that line. Three large kangaroos hopping across a small plain, were visible, just as we entered these regions of the sun. The air was extremely fragrant; the shrubs and grass being still moist with the thunder-shower. The course of the river continued favourable, and the country seemed to improve as we advanced, opening into plains skirted by scrubs of rosewood, and drooping shrubs whose verdure was most refreshing to the eye, after just having passed through dry and withered brigalow. At eight miles a large lagoon appeared on our left, on which we saw many ducks, and at nine miles we encamped where the grass seemed good, finding that water was at hand now, in the river bed, wherever we required it. Latitude, 23° 25' 26" S. Thermometer, at sunrise, 45°; at noon, 77°; at 4 p.m., 85°; at 9, 53°. (LVII.)
26TH JULY.—The river appearing to pursue a W. N.W. course, I set out in that direction, attracted there, also, by some open plain separated by scrub from the river. We travelled on, a good many miles, when, instead of the firm clay, we found, under foot soft, red sand, and trees of the genus callitris growing in close thickets. I turned to the northward, and travelled many miles to the eastward of north, without seeing any indications of the river, whose general course had been previously straight. Scrubs of almost every description lay in our way. Brigalow, rosewood, casuarina, a thick light-green scrub of a close-growing bush, new to us, and some scrubs of the tree as yet undescribed for want of flowers or fruit, although well known to us as a graceful, and, indeed; useful bush; of which, as an impediment, we could not much complain; and useful, as forming excellent whip-shafts. This is the tree of unknown fruit figured in my former journal. At length, when it was growing late, I travelled eastward to make sure of the river, and, at length, regained its banks, where we found in its bed plenty of water. The surface looked bare, and the grass dry; but this day I discovered green shoots amongst it, evidently the product of recent rain, and indicating the approach of spring. On sandstone rocks, we found a plant which Sir William Hooker terms "a singular Euphorbiaceous (?) plant[*]," destitute of flower and fruit. Branches very thick, and they, as well as the long petioles and underside of the leaves clothed with dense white wool. Leaves a span long, cordato acuminate; the laminae all pointing downwards, glossy green and glabrous above. Also a new DODONOEA, with very narrow, linear, pinnated leaves. The only hills visible, from a tree ascended by Yuranigh, during this day's journey were those to the eastward, already seen. None appeared above the horizon in any other direction. Thermometer, at sunrise, 39°; at noon, 79°; at 4 p.m., 89°; at 9, 75°. (LVIII,)
[* D. TENUIFOLIA (Lindl. MS.); glaberrima, viscosa, ramulis angulatis, foliis impari pinnatis: foliolis 3-5-jugis linearibus obtusis subalternis.]
27TH JULY.—The same characteristic, still distinguished our river; a variety of channels, so concatenated amongst brigalow scrub, much whereof lay dead, that it was scarcely possible to ascertain whether there was any main channel. Hitherto, I had not detected one; but this was of little consequence to us, so long as these ponds contained abundance of water. This we saw in many parts of our route this day; for I kept as close as possible to the river's course, to avoid such detours as that of yesterday, and being very anxious about the river's general direction, I was glad to find it turn somewhat westward of north. After travelling thus about nine miles, I perceived a blue pic nearly due north, which I named Mount Narrien; and Yuranigh saw from a tree, that there was a range in the same direction, but very distant. This seemed likely not only to send down some additional waters to our river, but also to turn it westward. Entering, soon after, upon a plain of good grass, I looked for water; and, on finding some, encamped after a journey of about eleven miles. Latitude, 23° 9'S. Thermometer, at sunrise, 43°; at noon, 83°; at 4 p.m., 90°; at 9, 53°. (LIX.)
28TH JULY.—The brigalow scrub, still a concomitant of our river, so hemmed in the patch of plain, that I was obliged to move out of it, in a southerly direction. Even thus, however, the scrub was not to be avoided, and we were obliged to force a way through, where the still more formidable impediment of much fallen timber, rendered it almost impossible that our vehicles could pass. This dead wood seemed peculiar to that sort of brigalow, and appeared to remain unburnt, chiefly from the usually naked surface of the ground where brigalow grows. I left the party, when brought almost to a stand, and sought for a more open part, by riding northward. This rather singular river seemed to have spread over a considerable extent of surface, and much of the brigalow, however fond of water, appeared to have died of too much, on spots which had been flooded. I traversed a plain, beyond which I found, what seemed there, the main chain of ponds or channel. There was a fine reach of water, and beside it, were the still smoking fires, water-vessels, etc., of a tribe of natives, who had disappeared. On the plain, the remains of decayed stumps of brigalow showed that there also, this tree had once grown, and that the openings were caused only by such trees perishing; as if, according to seasons, the half-dead scrub might either give place to open downs, or, that the plains might, by long succession of regular seasons, become again covered with scrub. I returned to the party halted in the scrub, and conducted it through an opening I had found, to the plain, and across it, in a N.W. direction; where, after passing through some open forest, we had again to contend with brigalow. One of the many dry channels assisted us much in seeking openings, as the bottom then consisted of smooth, firm, clay. A pond, however, obliged us to quit it, and seek our way through the wood. We arrived next at slightly undulating ground, and finally entered an open forest, where I saw the LORANTHUS SUBFALCATUS of Sir William Hooker. I made Yuranigh climb a tree, from whence he again saw the pic seen yesterday, (the bearing of which I ascertained), and also a gap appeared in the range beside it, through which, as he thought, a river was likely to come down. The extreme westerly escarp of these hills bore 17° E. of N., so that nothing was likely to impede the continued course of our friendly river in the direction we wished. The scrub we met with on the rising ground, consisted of the verdant bushes in rosewood scrubs, and we next found brigalow all dead, with a rich crop of grass growing amongst the dead stems. I had never seen grass, amongst brigalow, when in a healthy state. On turning northward, we next entered upon an open plain covered with good grass mixed with verdant polygonum. I selected a corner of this plain, nearest to the river, for my camp; and, on approaching its bed, found water as usual, near some old huts of the natives. Latitude, 23° 5' 20" S. Thermometer, at sunrise, 44°; at noon, 82°; at 4 p.m., 88°; at 9, 58°. (XL.)
29TH JULY.—The scrub between our camp and the river, admitted of easy access from it to open forest ground, over which we travelled in a N.W. direction for several miles. Belts of scrub, consisting of rosewood and other acacias intervened, and, in some parts, TRIODIA PUNGENS grew in the place of grass. But, upon the whole, the country was fine, open, park-like, and with much anthistiria, and other grasses in which a greenness was observed quite novel to us, and unexpected in these tropical regions. Amongst the shrubs, we recognised the CASSIA HETEROLOBA, a small yellow-flowered shrub; also a glutinous Baccharislike plant, and a form of Eremophila Mitchellii, intermediate between the two other varieties. This was a shrub ten feet high. Another new species of the genus GEIJERA formed a tree twenty feet high, with long slender weeping branches. It was otherwise much like the GEIJERA PARVIFLORA, except that its flowers were larger.[*] A dwarf shrub belonging to the genus STENOCHILUS, but new, was found here[**]; and we met also with a large spreading tree, from which we could bring away nothing that would enable botanists to describe it, except as to the texture and nervation of the leaves, which, Sir William Hooker observes, resemble CAPPARIDEOE; but the fruit appeared to be sessile, and was too young and too imperfect to lead to any satisfactory conclusion. The very crows cawed differently from those near Sydney, or, (as Yuranigh observed) "talked another language." This river was not the least unique of our recent discoveries. It still consisted of a great breadth of concatenated hollows without any one continuous channel, and this character seemed to be preserved by various trees growing in the banks. When their large roots became denuded by the floods, or were washed out, or partially gave way, so that the tree fell over the stream, they presented impediments, first to the floating-wreck, and, next, to the water itself: when that collection of floating wreck became consolidated with muddy deposit, new banks so formed forced the river into new currents, working out new courses; and this appeared to give the peculiar character so uniformly observed. It seems extremely favourable for the retention of water in a country where it may be scarce; for the many ponds so formed and shaded from the sun, preserve it much better and longer, than if one continuous unobstructed channel alone, received and carried off, the water of the surface. I found the hollows we saw this day drier than usual; but we at length succeeded in discovering three good ponds. The foliage of the trees, with dry and naked water-worn roots, presented all the hues of an English autumn, although none of these were deciduous. This effect I was disposed to attribute to unseasonable drought, or past heat. The weather we had was delightful; for, although the thermometer in the shade rose sometimes to 90° about 4 p.m., the heat of the Bogan was still fresh in our recollection; and the frosts which, not above three weeks before, had disturbed our sleep, made this degree of heat as welcome as the flowers in May. Latitude, 22° 55' 35" S. Thermometer, at sunrise, 38°; at noon, 80°; at 4 p.m., 85°; at 9, 51°. (LXI.)
[* G. PENDULA (Lindl. MS.); ramis gracilibus pendulis, foliis linearibus in petiolum sensim angustatis 5 uncias longis cum ramo parallelis.]
[** S. SALICINUS (Benth. MS.); foliis lanceolato-linearibus integerrimis apice subuncinato ramulisque canescentibus, calycis foliolis brevibus lanceolatis, corollae puberulae inferne attenuatae laciniis obtusis infimâ retusâ vix caeteris magis solutâ.—Very near S. PUBIFLORUS, but much whiter, the flowers smaller with the lobes much more equal, the lower one much broader.]