rocky summits of columnar structure, as at the head of the Gilbert River a dark-coloured trap changing into porphyry formed some of the lower ridges, and was largely developed on the bank of the Suttor. Thin veins of calcareous spar and quartz intersected the granite. The bed of the Burdekin where we last saw it, one mile above the junction of the Suttor, was about half a mile wide with a stream of water varying from twenty yards wide to the whole breadth of the channel, which was very level and sandy. The Suttor is but a small river compared with the Burdekin. Near the camp it formed some fine reaches of water 180 yards wide, but of no great depth. The trees on its banks were much broken and bent by a violent flood which had occurred within the year. Considering the number of miles we have travelled along the banks of the Burdekin, few impediments have been encountered, while the extent of country suited for squatting purposes is very considerable--water forming a never-failing stream throughout the whole distance. Latitude by a Gruis and a Pegasi 20 degrees 36 minutes 20 seconds; variation of compass 70 degrees east. THE FIRST BRIGALOW SCRUB. 31st October. A rainy night was followed by a thick fog in the morning, so that when we started at 6.30 a.m. it was with difficulty the deep gullies on the banks of the Suttor were avoided; steering south-west for one hour, crossed to the right bank of the Suttor, and then by an average south course passed to the west of Mount McConnell, which, by its isolated character and height (about 600 feet above the river) forms a very conspicuous landmark. It is wooded to the summit, and has fine patches of grass on the slopes, with cliffs of porphyry near the upper part, this being the prevailing rock; on the right bank white shaly rocks and dark trap, with veins of calcareous spar and limestone, prevailed on the left bank of the Suttor; the country on both sides well grassed and openly timbered with ironbark. The bed of the river was very irregular and sandy, with small shallow pools of water at intervals; at 11.0 the river came from the south-west, but continuing a south course we crossed some fine basaltic plains, covered with fine grass and separated by open box forest; at noon crossed a sandstone hill, the base of which was porphyry; traversing ironbark ridges for an hour, we crossed a sandy creek coming from the east, and at 1.0 p.m. encountered the first brigalow scrub; through this scrub we steered south-west till 3.40, and camped on a small dry creek with a narrow grassy flat; water was obtained from a small gully where it had lodged during a shower on the previous night. The country till we reached the brigalow scrub was well adapted for pastoral purposes; the rock trap, slate, and porphyry, with veins of limestone. The brigalow scrub grows on the detritus of a coarse conglomerate, the larger boulders of which lay scattered over the surface of the ground; these boulders