ious and enterprising expedition.
Certainly it is most desirable to ascertain whether the river I have
supposed to be the Darling be really so or not. I have stated my
objection to depots, but I think that if a party commenced its
operations upon the Murray from the junction upwards, and, after
ascertaining the fact of its ultimate course, turned away to the N.W.
up one of the tributaries of the Murray, with a supply of six months'
provisions, the results would be of the most satisfactory kind, and the
features of the country be wholly developed. I cannot, I think,
conclude this work better than by expressing a hope, that the Colonial
Government will direct such measures to be adopted as may be necessary
for the extension of our geographical knowledge in Australia. The
facilities of fitting out expeditions in New South Wales, render the
expenses of little moment, when compared with the importance of the
object in view; and although I am labouring under the effects of former
attempts, yet would I willingly give such assistance as I could to
carry such an object into effect.

APPENDIX.

APPENDIX No. I.

GEOLOGICAL SPECIMENS FOUND TO THE SOUTH-WEST OF PORT JACKSON.

Considering the nature of the country over which the first expedition
travelled, it could hardly have been expected that its geological
specimens would be numerous. It will appear, however, from the
following list of rocks collected during the second expedition, that
the geological formation of the mountains to the S.W. of Port Jackson
is as various as that to the N.W. of it is mountainous. The specimens
are described not according to their natural order, but in the
succession in which they were found, commencing from Yass Plains, and
during the subsequent stages of the journey.

Sandstone, Old Red.--Found on various parts of Yass Plains, in contact
with

Limestone, Transition.--Colour dark grey; composes the bed of the Yass
River, and apparently traverses the sandstone formation. Yass Plains
lie 170 miles to the S.W. of Sydney.

Sandstone, Old Red.--Again succeeds the limestone, and continues to the
N.W. to a considerable distance over a poor and scrubby country,
covered for the most part with a dwarf species of Eucalyptus.

Granite.--Colour grey; feldspar, black mica, and quartz: succeeds the
sandstone, and continues to the S.W. as far as the Morumbidgee River,
over an open forest country broken into hill and dale. It is generally
on th