dstone cropped out, over which the
basalt had most evidently spread. Farther on, the ridge enlarged and
formed small hillocks, with bare rock cropping out at their tops;--a form
of surface peculiar to the basaltic or whinstone country of this colony.

Charley shot the sheldrake of Port Essington, (Tadorna Rajah). The
singular hissing or grinding note of the bower bird was heard all along
the river; the fruit of the fig trees growing near, which seemed to
supply it with its principal food during this part of the year.

April 15.--One of our bullocks had gone back on our tracks, and thereby
prevented our starting so early as usual. We travelled in a N. 40 degrees
W. direction to latitude 19 degrees 41 minutes 25 seconds. The basaltic
country continued, and apparently extended a great distance from the
river. The flats along the latter were less extensive. Sandstone cropped
out in deep gullies, and in the bed of the river; it was naturally soft
and coarse, but where it rose into hillocks near basalt, it changed into
a fine baked sandstone, resembling quartzite, which, when in contact with
the igneous rock, looked like burnt bricks. Near our camp, a dyke or wall
of the aspect of a flinty red conglomerate, crossed the river from
south-west to north-east. I believe that this rock belongs to the
porphyries of Glendon, and of the upper Gloucester. We continued to feel
the breeze, or rather a puff of wind, between 7 and 8 o'clock at night;
it was often very strong and cold, and prevented the mosquitoes from
molesting us.

April 16.--We proceeded north by west to latitude 19 degrees 32 minutes,
and crossed several gullies coming from the basaltic ridges: these,
however, receded far from the river, and large box and Ironbark flats
took their place for about three miles, when the ridges re-appeared.
Between four and five miles from the bar of red rock above mentioned, a
fine large creek joined the Burdekin from the westward. The box and
Ironbark forest was interrupted by slight rises of limestone full of
corals; and by a higher hill of baked sandstone, at the foot of which a
limestone hill was covered with a patch of Vitex scrub. The strata of the
limestone seemed to dip to the southward.

The opposite banks of the river were ridgy, but openly timbered, and this
fine country, with its well grassed flats, and its open ridges, seemed to
extend very far on both sides. Messrs. Gilbert and Roper went to the top
of the hill, and saw r