Oct. 13.--We travelled about sixteen miles to the southward, to lat. 15 degrees 29 minutes 10 seconds, following the river, and heading several salt water creeks, which prolonged our journey very much. Stony hills and ranges frequently approached the river, and rendered our travelling difficult and fatiguing. They were composed of baked sandstone, and white and blue indurated clay, the strata of which dipped at a very small angle to the southward, and the strike from east to west. The flats between the ranges, and along the river and creeks, were openly timbered and well grassed; and, at the head of a salt-water creek, we found deep ponds of constant water covered with Nymphaeas, and surrounded with Typhas and drooping tea-trees. Towards the end of the stage, where the high rocky hills formed deep declivities into the river, we had to ascend them, and to travel along their summits. A good sized creek joined the river at their southern slopes, which, though salt below, contained some good pools of fresh water higher up. To the southward of this creek, there were four very remarkable flat-topped cones of sandstone, which appeared like a plateau cut into four detached masses. These I called the "Four Archers," in honour of my excellent hosts Messrs. David, Charles, John, and Thomas Archer of Moreton Bay. From the eastern one, I enjoyed a fine view, and distinguished distant ranges broken by a gap to the southward, and detached long-stretched ridges to the westward. I went with Charley to examine the river, in order to find a fording place, in which we succeeded at about four miles south-west from our camp, in lat. 15 degrees 30 minutes 31 seconds; where a stony bar crossed the salt water, leaving a small channel in which the tide formed a shallow stream. The bed of the river became very broad and sandy, covered with shrubs like those of the Lynd and most of the other rivers we had passed. Oct. 14.--We crossed the river, and travelled about ten miles north-west, over a succession of stony ridges, separated by fine open tea-tree and box flats. Some fine shallow sandy watercourses, quite dry, went down to the north by east. At the end of the stage, the uniform colour of the country was interrupted by the green line of a river-bed, so pleasing and so refreshing to the eye, with the rich verdure of its drooping tea-trees and myrtles, interspersed with the silver leaves of Acacia neurocarpa and Grevillea chrysodendron. The river was formed by two broad sandy beds, separated by a high bergue, and was full 700 yards from bank to bank. It contained large detached water-pools fringed with Pandanus, which were very probably connected by a stream filtering through the sands, I called it the "Wickham," in honour of Captain Wickham, R.N. of Moreton Bay, who had recently commanded a survey of the north-west coast of New Holland, in H.M.S. Beagle.