apart, the sand being thrown by the south-east gales into acute ridges thirty to sixty feet high, their direction being almost invariably north 109 degrees east.  Travelling to 2.15 p.m., we got over about eighteen miles, the valleys yielding little else but triodia, with occasional patches of stunted gum forest, in which was found a little good grass, on which were feeding flights of pigeons and a variety of parrot new to us, but which I believe to be the golden-backed parakeet (Psephotus chrysopterygius) of Gould.  As no water could be found, and many of the horses gave signs of being greatly distressed, no change being observable in the country for many miles ahead, a few very distant ranges being the only objects visible, we were obliged to have recourse to the only safe expedient of falling back and forming a depot.  Resting to 5.10, we commenced a retreat until 7.20, having been obliged to abandon a horse of Mr. Brown’s, quite exhausted.  Camp 75.

4th September.

At 6.30 a.m. resumed our retreat, and by noon arrived at the waterhole of the 2nd, having left two more horses behind, which, however, Mr. Brown and myself carried out water to in the course of the evening and drove them in during the night.

5th September.

Leaving the party to rest, I walked ten or twelve miles round to the south-south-eastward, along the foot of the range, in search of water, and to ascertain if a better line of country could be found in that direction, but it continued to maintain the same arid appearance, and I only came on one pool in a gully four miles from the camp.  Depot.

6th September.

Leaving Mr. Turner and four of the party in depot, with instructions to remain there three days, and then fall back upon the Oakover, where there was much better feed, I started with Messrs. Brown and Harding, taking six of the strongest horses, sixteen days’ rations and six gallons of water, and steered south-south-east along the ranges for six or eight miles, looking for some stream-bed that might lead us through the plains, but was disappointed to find that they were all lost in the first mile after leaving the hills, and as crossing the numerous ridges of sand proved very fatiguing to the horses, we determined once more to attempt to strike to the eastward between the ridges, which we did for fifteen miles, when our horses again showed signs of failing us, which left us the only alternative of either pushing on at all hazards to a distant range that was now just visible to the eastward, where, from the numerous native fires and general depression of the country, there was every reason to think a large river would be found to exist, or to make for some deep rocky gorges in the granite hills ten miles to the south, in which there was every prospect of finding water.  In the former case the travelling would be smoothest, but the distance so great that, in the event of our failing to obtain water, we probably should not succeed in bringing back one of our horses; while, in the latter, we should have to climb over the sand ridges, which we had already found so fatiguing; this course, however, involved the least amount of risk, and we accordingly struck south four miles, and halted for the night.  Camp 76.