We made for Morrisset's chain of ponds, and travelled over rich and extensive plains, divided by plantations of cypress, box, and casuarina, in the early and latter period of the day. About noon we entered a dense forest of cypresses, which continued for three miles, when the cypresses became mixed with casuarina, box, and mountain-gum, a tree we had not remarked before in so low a situation. We struck upon the creek after a journey of about 15 miles. It had a sandy bed, and was extremely tortuous in its course, nor was it until after a considerable search, that we at length succeeded in finding water, at which a party of natives were encamped. The moment they saw us, they fled, and left all their utensils, &c. behind them. Among other things, we found a number of bark troughs, filled with the gum of the mimosa, and vast quantities of gum made into cakes upon the ground. From this it would appear these unfortunate creatures were reduced to the last extremity, and, being unable to procure any other nourishment, had been obliged to collect this mucilaginous food. The plains we traversed, were of uniform equality of surface. Water evidently lodges and continues on them long after a fall of rain, and in wet seasons they must, I should imagine, be full of quagmires, and almost impassable. 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. REACH THE CASTLEREAGH RIVER. 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. WANT OF WATER; CHARACTER OF THE COUNTRY.