Feb. 12.--I went, accompanied by Mr. Roper and Charley, in a due north direction to reconnoitre the country. The flat continued for about eight miles, and then changed into slight undulations. Considerable tracts were covered with the Poplar-gum; and broad belts of Bricklow descended from the hills towards the east. In the scrub; Fusanus was observed in fruit, and the Stenochilus and the white Vitex in blossom; from the latter the native bee extracts a most delicious honey. A small tree, with stiff alternate leaves scarcely an inch long, was covered with red fruit of the form of an acorn, and about half an inch long, having a sweet pericarp with two compressed grain-like seeds, which had the horny albumen of the coffee, and were exceedingly bitter. The pigeons, crows, and cockatoos, fed upon them, we also ate a great number of them; but the edible portion of each seed was very small. It is a remarkable fact that trees, which we had found in full blossom or in fruit in October and November, were again observed to be in blossom and fruit in February. We had to encamp at night without water; and although the clouds gathered in the afternoon of a very hot day, yet no thunder-storm came to our relief. The night breeze, which was in all probability the sea-breeze, set in about ten minutes to six. Feb. 13.--The morning was very cloudy. I continued my course to the northward, and, coming to a watercourse, followed it down in the hopes of finding water: it led us to the broad deep channel of a river, but now entirely dry. The bed was very sandy, with reeds and an abundance of small Casuarinas. Large flooded-gums and Casuarinas grew at intervals along its banks, and fine openly timbered flats extended on both sides towards belts of scrub. The river came from the north and north-west, skirting some fine ranges, which were about three miles from its left bank. As the river promised to be one of some importance I called it the "Isaacs," in acknowledgment of the kind support we received from F. Isaacs, Esq. of Darling Downs.