The general course of the creek being northerly, and our distance from the McArthur about 20 miles on the chart, steered south-east from 6.35 a.m., crossing many rocky sandstone ridges and hills, the strata of which dipped 20 degrees to 40 degrees to the west. At noon from one of the higher ridges saw the valley of the McArthur River to the south-east; continuing our course, descended a small dry watercourse till 4.0 p.m., when we reached a large creek with a belt of casuarina, melaleuca and eucalypti along its banks. The channel was dry and sandy, about twenty yards wide, but showed the marks of high floods. Following the creek down for three-quarters of an hour found a small pool just sufficient for the supply of the party. Just below our camp a creek fifteen yards wide joined the principal one from the south, and, from the general lay of the country, it was evident that we were now on the McArthur River of Leichhardt; but though from the steepness of the banks the floods frequently rise thirty to forty feet, the creek did not bear the character of one which would take its rise at any great distance inland of our track. The country passed over was very thinly wooded with eucalypti of small growth, seldom more than one and a half feet in diameter and fifty feet high; a few leguminous ironbark, and sterculia were scattered on the hills, with much triodia and little grass. After crossing the highest ridge at 11.0 a.m. the sandstone strata were variously inclined, but generally to the west or north-east at high angles, except on the immediate bank of the McArthur, where the sandstones were horizontal. To the south-west of our route the country rose into stony hills of very barren aspect, but to the north the country appeared to be wooded. Latitude by Vega 16 degrees 25 minutes 11 seconds. 5th August. The country to the south-east being very rocky and broken, we followed down the river, leaving the camp at 7.20 a.m., the general course north-east; the sandstone hills rose abruptly from the bank of the river, the sandstone rock being frequently worn away in a partial manner, so as to leave isolated columns sometimes three feet in diameter and thirty feet high; a few miles below the camp a few pools of water were seen, but there was no grass near them, and we continued our route for four hours, and camped at a shallow pool with a small patch of grass on the bank of the river; the principal channel of the river was only twenty-three yards wide, but in times of flood the side channels carry off the greater portion of the water, which rises nearly forty feet; considerable quantities of mussel-shells lay at the old camps of the blacks along the bank of the river. Latitude by meridian altitude of the sun 16 degrees 18 minutes 41 seconds; longitude by lunar distances 136 degrees 21 minutes. 6th August.