The nights had been generally cloudy, with the exception of the last, which was clear with heavy dew. The days were very hot before the setting in of the sea breeze, which now generally took place at half past eleven. But the refreshing breeze was little felt in the close stringy-bark forest, which, with the dust rising under our bullocks' feet, rendered the heat almost suffocating. Sept. 21.--Our journey to-day was in a N. 50 degrees W. direction for about eleven miles, through stringy-bark forest, in which the Melaleuca and the Cypress pine were either scattered, or formed small patches of forest. We then crossed a shallow sandy creek surrounded with thickets of Cypress pine; passed some broad-leaved tea-tree forest, and came to a fine open country timbered with tea-tree, and, farther on, with box and white gum. After fifteen miles, our course was intercepted by the largest salt-water river we had yet seen, and we turned at once to the W.S.W. in order to head it. Deep hollows surrounded by tea-trees, but quite dry, extended parallel to the river. We observed several islands in the river; and it was joined by some deep creeks filled with salt water at their lower parts, but dry higher up. The whole country was equally open and well grassed. The leguminous Ironbark, the white-barked tree of the Abel Tasman, the fig tree, and Sterculia in fruit, grew in the forest; and the white water-gum in the hollows, the drooping tea-tree at the level of the freshes, and a species of salt-water Casuarina below it. I called this river the "Macarthur," in acknowledgment of the liberal support my expedition received from Messrs. James and William Macarthur of Cambden.