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 ranges trending from west to north, with that crenelated outline which I had before seen and mentioned: they distinguished a large valley, and the smoke of several fires of the natives along the range.