head of the Isaacs bore N. 55 degrees E. Many high ranges were seen
towards the north and north-east. Towards the south the horizon was
broken only by some very distant isolated mountains. Peak Range was not
visible. A group of three mountains appeared towards the north-west; one
of them had a flat top. The whole country to the westward was formed of
low ridges, among which the Suttor seemed to shape its winding course.
The hills on which we stood, as well as the banks of the creek, were
composed of flint-rock. Pebbles and blocks of Pegmatite covered the bed
of the creek. This rock also cropped out along the river. This was the
first time since leaving Moreton Bay that we met with primitive rocks,
and I invite the attention of geologists to the close connection of the
flint rock with granitic rocks; which I had many opportunities of
observing in almost every part of the northern and western falls of the
table land of New England.

A Melaleuca with very small decussate leaves, a tree about twenty-five
feet high, was growing on the scrubby ridges. Flooded-gums of most
majestic size, and Casuarinas, grew along the river; in which there were
many large reedy water-holes. The season must be more than usually dry,
some of the largest holes containing only shallow pools, which were
crowded with small fishes, seemingly gasping for rain. A Ruellia, with
large white and blue flowers, adorned the grassy flats along the Suttor.
The latitude of this spot was 21 degrees 26 minutes 36 seconds.

March 14.--We removed down the river about eight miles S. S. W. to good
water-holes, which had been seen by my companions the day before. Here
the scrub approached the river, leaving only a narrow belt of open
forest, which was occasionally interrupted by low ridges of stunted
silver-leaved Ironbark. Pegmatite and Porphyry (with a very few small
crystals of felspar) and Gneiss? were observed in situ. On our way we
passed a fine lagoon. A dry but not hot wind blew from the S. S. W.; the
night and morning were bright; cumuli with sharp margins hung about after
eleven o'clock.

A pelican was seen flying down the river, and two native companions and
an ibis were at the water-holes. Crows, cockatoos, and ducks were
frequent. From the remains of mussels about these water-holes, the
natives have enjoyed many recent meals.

I sent Mr. Roper and Charley down the river, who informed me, on their
return late at night, that they had found water at diffe