March 24.--We travelled about nine miles N. 60 degrees W. along the river; a small creek joined from the westward. At night we had a heavy thunder-storm from the S.W. March 25.--Weather very hot; clouds formed during the afternoon. We continued our journey along the river to lat. 21 degrees 3 minutes; the river winds considerably. We passed several hills at the latter part of the stage. I ascended one of them, on the right bank of the river, and obtained an extensive view of the country, which has a very uniform character. There were ridges and low ranges to the westward, one of which stretched from N. by W. far to the westward. The hill on which I stood was composed of limestone rock; it was flat-topped, with steep slopes at each end. In lat. about 21 degrees 6 minutes, we crossed a large creek, densely lined with dropping tea trees, coming from the westward. It was here we first met with Careya arborea (Roxb.), a small tree from fifteen to twenty feet high, with elliptical leaves of soft texture, four inches long, and two in breadth; its fruit was about two inches long, contained many seeds, and resembled that of the Guava. Its leaves, however, had neither the vernation nor the pellucid dots of Myrtaceous trees. At the junction of the creek, a great number of small Corypha palms were growing, and my companions observed the dead stems of some very high ones, whose tops had been cut off by the natives, probably to obtain the young shoot. We passed hills of baked sandstone, before reaching the creek, and afterwards crossed a fine sandy flat, with poplar-gum. The river has a broad bed, at times dividing into several channels, lined with stately Melaleucas and flooded-gum, and again uniting into one deep channel, with long reaches of water surrounded by Polygonums, and overgrown with blue Nymphaeas, Damasoniums, and Utricularias, and inhabited by large flights of ducks. Rock occasionally enters into the bed of the river. The collateral lines of water-holes are rarely interrupted, and the ridges appear to be open on both sides of the river.