As several of the horses required a day's rest, at 6.0 a.m. I started with Mr. H. Gregory to examine the country to the southward, and followed the river through a fine grassy plain till 10.0, when it entered the sandstone ranges, and the valley contracted to half a mile; the hills were steep, but the level ground in the valley, except where intersected by gullies, was good travelling and well grassed. The river is much reduced in size and the water is confined to the smaller channels of the principal bed; the water is clear, and had not that muddy appearance which characterises it lower down. The geological character of the rocks is unchanged; but the bed of the river being less deeply excavated, the lower beds of limestone and jasper are not so largely developed, the summit of the hills are not quite as level, and large blocks of sandstone, the remains of an upper stratum, gives the country a very rugged appearance. Returned to the camp at 6.30 p.m. In the evening there was a heavy thunder-squall from the north, but the weather cleared at midnight. LOSE A HORSE. 17th January. Started at 7.5 a.m. and steered a south-west course till 10.30 a.m., passing over a level grassy flat the whole distance; but the soil became more sandy as we proceeded up the river; there is very little wood of any description; the few trees that exist are white-stem eucalypti and a few acacia with pinnate leaves; the horse Sam is very weak, and two other horses are lame and can scarcely travel; since the 3rd of January the distance travelled has not exceeded ten miles per diem; water and grass everywhere abundant, and the loads not heavy, yet the greater part of the horses appear to be unable to perform a greater amount of work. Latitude by Aldebaran 16 degrees 36 minutes 43 seconds. 18th January. Some of the horses having strayed towards our last camp, we were detained till 8.10 a.m. and then steered south for three miles; the sandstone hills here closed in on each side of the river, scarcely leaving a passage at the base of the steep rocks; here the horse Sam fell into a pool of water, and when extricated could not stand; this having caused considerable delay, we encamped in a grassy flat half a mile farther on; in the evening sent Bowman and Dean to bring the horse to the camp, but they found him dead; marked a tree near camp 14. 19th January.