The main range now ran on in more disconnected portions than formerly; their general direction was 25 degrees south of east. We still had a mass of low hills to the south. We continued to travel under the lea of the main walls, and had to encamp without water, having travelled twenty-five miles from the Ruined Rampart. A high cone in the range I called Mount Curdie*. The next morning I ascended the eastern end of Mount Curdie. A long way off, over the tops of other hills, I could see a peak bearing 27 degrees south of east; this I supposed was, as it ought to be, the Sugar-loaf Hill, south westward from Mount Olga, and mentioned previously. To the north there was a long wall-like line stretching across the horizon, ending about north-east; this appeared to be a disconnected range, apparently of the same kind as this, and having gaps or passes to allow watercourses to run through; I called it Blood's Range. I could trace the Hull for many miles, winding away a trifle west of north. It is evident that there must exist some gigantic basin into which the Rebecca, the Docker, and the Hull, and very likely several more further east, must flow. I feel morally sure that the Lake Amadeus of my former journey must be the receptacle into which these creeks descend, and if there are creeks running into the lake from the south, may there not also be others running in, from the north and west? The line of the southern hills, connected with the Petermann wall, runs across the bearing of the Sugar-loaf, so that I shall have to pass over or through them to reach it. The outer walls still run on in disconnected groups, in nearly the same direction as the southern hills, forming a kind of back wall all the way.