Doctor Gibson had kindly accompanied us to Breadalbane Plains. On the morning of the 18th he returned to Tyranna, and we pursued our journey, keeping mostly on a W.S.W. course. From the barren hills over which we passed, on leaving the plains, we descended upon an undulating country, and found a change of rock, as well as of vegetation, upon it. Granite and porphyry constituted its base. An open forest, on which the eucalyptus mannifera alone prevailed, lay on either side of us, and although the soil was coarse, and partook in a great measure of the decomposition of the rock it covered, there was no deficiency of grass. On the contrary, this part of the interior is decidedly well adapted for pasturing cattle. THE LORN. About 1 p.m. we passed Mr. Hume's station, with whom I remained for a short time. He had fixed his establishment on the banks of the Lorn, a small river, issuing from the broken country near Lake George, and now ascertained to be one of the largest branches of the Lachlan River. We had descended a barren pass of stringy bark scrub, on sandstone rock, a little before we reached Mr. Hume's station, but around it the same, open forest tract again prevailed. We crossed the Lorn, at 2 o'clock, leaving Mr. Broughton's farm upon our left, and passed through a broken country, which was very far from being deficient in pasture. We encamped on the side of a water-course, about 4 o'clock, having travelled about fifteen miles. On the 19th, we observed no change in the soil or aspect of the country, for the first five miles. The eucalyptus mannifera was the most prevalent of the forest trees, and certainly its presence indicated a more flourishing state in the minor vegetation. At about five miles, however, from where we had slept, sandstone reappeared, and with it the barren scrub that usually grows upon a sandy and inhospitable soil. One of the drays was upset in its progress down a broken pass, where the road had been altogether neglected, and it was difficult to avoid accidents. Fortunately we suffered no further than in the delay that the necessity of unloading the dray, and reloading it, occasioned. Mr. O'Brien, an enterprising settler, who had pushed his flocks to the banks of the Morumbidgee, and who was proceeding to visit his several stations, overtook us in the midst of our troubles. We had already passed each other frequently on the road, but he now preceded me to his establishment at Yass; at which I proposed remaining for a day. We stopped about three miles short of the plains for the night, at the gorge of the pass through which we had latterly been advancing, and had gradually descended to a more open country. From the place at which we were temporarily delayed, and which is not inappropriately called the Devil's Pass, the road winds about between ranges, differing in every respect from any we had as yet noticed. The sides of the hills were steeper, and their summits sharper, than any we had crossed.