with a man carrying my theodolite, for Mount Red Cap, distant from our camp about six miles. This little red cone had a very singular appearance, as we approached it from the east. A dark tinted scrub of flat-topped trees enveloped its base, on the outside of which the light and graceful Acacia pendula also grew on the grassy plain. I found the red rock to be the common one of the country, in a state of decomposition. It was hollowed out by some burrowing animal, whose tracks had opened ways through the thick thorny scrub, enabling us to lead our horses to near the top. From the apex, I obtained an extensive view of the country then before us, in many parts clear of wood to the verge of the horizon, and finely studded with isolated hills of picturesque form, and patches of wood. Looking backward, or in the direction whence we had come, our valley appeared hemmed in by more continuous ridges; and, towards the extremity of them, I could just recognise Mount First View, this being one of the distant cones I had seen from it. I took as many angles as the descending sun permitted, and then retraced our horses' tracks to the camp. Thermometer, at sunrise, 20 deg.; at 9 P. M., 47 deg.. Height above the sea, 747 feet. 7TH MAY.--Pursuing a N. W. course, we crossed a fine tract of open forest, then a plain, beyond which we entered a scrub of Acacia pendula, in which pigeons and quail were very numerous. Turning northward, now anxious again to see the river, on approaching this open country, we found what we considered the highest branch of it, in a chain of ponds skirting the wood bounding the plains. Halting the party, I continued my ride a mile and a half further northward, to the summit of a clear ridge. From thence I saw an open country to the northward, with some little wood. On my right, or to the eastward, a double topped hill sate in the centre of this fine open country, and from the abundance of good pasturage around it, I named it Mount Abundance. We continued still to follow the now attenuated channel upwards, and found it to come from the west, and even south-west, leaving the extreme corner of the open downs, and leading us into a scrub. There, it formed two branches, in neither of which could we find any water, and had consequently to return to the last of its ponds, situated exactly at the close of the open country towards the S. W. There, we encamped in latitude 26 deg. 42' 27" S., thankful that we had been enabled by its means to advance thus far, and to discover so fine a tract of country as that watered by it. Thermometer, at sunrise, 48 deg.; at 4 P. M., 68 deg.; at 9, 30 deg..