It may, however, be said, that as the course of the Darling is still involved in uncertainty, the question remains undecided; but it appears to me, the discovery of that river has set aside every conjecture (founded on previous observation) respecting the main features of the interior lying to the westward of the Blue Mountains.

Both Mr.Oxley and Mr.Cunningham drew their conclusions from the appearances of the country they severally explored.

The ground on which those theories were built, has been travelled over, and has not been found to realise them, but subsequent investigation has discovered to us a river, the dip of whose bed is to the S.W.We have every reason to believe that the sources of this river must be far to the northward of the most distant northerly point to which any survey has been made, as we are certain that it is far beyond the stretch of vision from the loftiest and most westerly of the barrier ranges; from which circumstance, it is evident that whatever disposition the streams descending from those ranges to the westward may show to hold a N.W.course more immediately at the base, the whole of the interior streams, from the Macquarie to the Dumaresq, are tributaries to the principal channel which conveys their united waters at right angles, if not still more opposite to the direction they were supposed to take, as far as is yet known.
COURSE OF THE DARLING.
The Darling River must be considered as the boundary line to all inland discoveries from the eastward.

Any judgment or opinion of the interior to the westward of that stream, would be extremely premature and uncertain.
There is not a single feature over it to guide or to strengthen either the one or the other.
CHARACTER OF THE WESTERN INTERIOR.
My impression, when travelling the country to the west and N.W.of the marshes of the Macquarie, was, that I was traversing a country of comparatively recent formation.

The sandy nature of its soil, the great want of vegetable decay, the salsolaceous character of its plants, the appearance of its isolated hills and flooded tracts, and its trifling elevations above the sea, severally contributed to strengthen these impressions on my mind.