From a hill, about a mile from our halting place on this day, we again saw the ranges, which had been sighted the day before.

South of us, and distant about a mile, there was a large dry lagoon, white with salt, and another of a similar kind to the west of it.
These changes in the character of the country convinced me that we should soon arrive at some more important one.

On the 4th we advanced as usual on a bearing of 75 degrees to the west of south, having then chained 65 miles upon it.

At about three miles we observed a sand hill in front of us, beyond which no land was to be seen, as if the country dipped, and there was a great hollow.

On arriving at this sand hill our further progress westward was checked by the intervention of an immense shallow and sandy basin, upon which we looked down from the place where we stood.
The hills we had seen the day before were still visible through a good telescope, but we could only distinguish their outlines; in addition to them, however, there was a nearer flattopped range, more to the northward and westward of the main range, which latter still bore S.S.W., and appeared to belong to a high and broken chain of mountains.