25TH MAY.--Protracting the observed angles I endeavoured to fix, if possible, some prominent points, whereby I might obtain some knowledge of the structure of the surrounding country. The result of my work was a conviction that the course of the river was parallel to the projecting extremities of the low range beyond it (River Head Range), and that its basin had extensive ramifications, back amongst the sandstone cliffs on this side. But the course downwards still remained a question, which diminished in its importance, as I discovered the upper course to come from where it was my wish to go. I resolved, nevertheless, while thus awaiting the arrival of the drays, to extend my ride of the 23RD MAY, and ascertain whether it could turn westward under the southern cliffs, the only direction in which it was likely to be available to us, downwards, at this time. Thermometer, at sunrise, 17 deg.; at noon, 70 deg.; at 4 P.M. 68 deg.; and at 9, 38 deg.. 26TH MAY.--Taking with me two men and Yuranigh, mounted, I retraced my former track to the westward, and on proceeding beyond the dry river bed, where I had previously been, I entered amongst sandstone gullies, where one grassy flat extended nearly in the direction I wished to pursue; and this brought me to a sort of table-land, covered with an open forest of iron-bark (with the common leaf). The rock consisted here of the same felspathic sort characterising most of the hills of the Barwan basin; the soil sterile, bearing, in lieu of the ordinary grass, the stiff, hard leaved, glutinous TRIODIA PUNGENS. But this was better than scrub, and, further on, I perceived through a forest on the western slopes, the blue distance and yellow plains of an open country. As plains usually accompany rivers, I believed I was approaching the river I was in search of. We crossed a deep watercourse falling to the S.E.b.S., and entered on a noble flat of firm rich soil, whereon grew luxuriantly, the ACACIA PENDULA (not previously seen by us in that region), and the two best kinds of grass, ANTHISTIRIA and PANICUM LOEVINODE. Then we came to a good pond of water, with recent footmarks of natives, and, at about a mile beyond, we reached the open downs. They extended eastward as far as we could see between the range on the S., under which I had expected to find the river, and the rocky country over which we had come. Westward, the downs were bounded by several very picturesque isolated conical hills,-- the southern sandy ranges on the S., still continuing westward like a limit to all this interior open country. Yet through that barrier the river had found a course, and instead of its overlooking the river, I found that the ground rose towards it, and I hastened four or five miles further westward, in hopes still to see it beyond the open downs, but I saw nothing like it. Kangaroos showed their heads occasionally amid the long grass: the air was all astir with pigeons, and traces of native inhabitants were numerous.