Oct. 11.--Travelling north-west we came to a Cypress-pine thicket, which formed the outside of a Bricklow scrub. This scrub was, at first, unusually open, and I thought that it would be of little extent; I was, however, very much mistaken: the Bricklow Acacia, Casuarinas and a stunted tea-tree, formed so impervious a thicket, that the bullocks, in forcing their way through it, tore the flour-bags, upset their loads, broke their straps, and severely tried the patience of my companions, who were almost continually occupied with reloading one or other of the restless brutes. Having travelled five miles into it, and finding no prospect of its termination, I resolved upon returning to our last camp, which, however, I was not enabled to effect, without experiencing great difficulty, delay, and loss; and it was not until the expiration of two days, that we retraced our steps, and reached the lagoon which we had left on the 11th. We had lost about 143 pounds of flour; Mr. Gilbert lost his tent, and injured the stock of his gun. The same night, rain set in, which lasted the whole of the next day: it came in heavy showers, with thunder-storms, from the north and north-west, and rendered the ground extremely boggy, and made us apprehensive of being inundated, for the lagoon was rapidly rising: our tent was a perfect puddle, and the horses and cattle were scarcely able to walk. Within the scrub there was a slight elevation, in which sandstone cropped out: it was covered with cypress-pine, and an Acacia, different from the Bricklow. The Bottle-tree (Sterculia, remarkable for an enlargement of the stem, about three feet above the ground,) was observed within the scrub: the white Vitex (?) and Geigera, SCHOTT., a small tree, with aromatic linear-lanceolate leaves, grew at its outside, and in small groves scattered through the open forest. Fusanus, a small tree with pinnate leaves, and Buttneria, a small shrub, were also found in these groves. Many pigeons were seen; the black cockatoo of Leach (Calyptorhynchus Leachii) was shot; we passed several nests of the brush-turkey (Talegalla Lathami, GOULD). Charley got a probably new species of bandicoot, with longer ears than the common one, and with white paws. We distinguished, during the rain, three different frogs, which made a very inharmonious concert. The succinea-like shells were very abundant in the moist grass; and a limnaea in the lagoon seemed to me to be a species different from those I had observed in the Moreton Bay district, The thermometer at sunset 62 degrees (in the water 68 degrees); at sunrise 52 degrees (in the water 62 degrees). On the 15th October, the wind changed during the afternoon to the westward, and cleared the sky, and dried the ground very rapidly.