After proceeding several miles without lett or hindrance, having successfully crossed some swampy rivulets all flowing to the left amidst thick scrubs, we at length arrived at a watercourse in which my horse went down, and which filled a very wide swampy bed enclosed by a thick growth of young mimosa trees, through which it was necessary to cut a passage wide enough for the carts. The scrub having been thus cleared to the extent of about 100 yards with much labour, I found only then unfortunately that although the roots grew very closely, and that water flowed over the surface, the earth was withal so soft that I could at every point with ease push a stick five feet down without reaching any firm bottom. The loose cattle were driven in, an experiment which until then we had tried with success in doubtful places, but they with difficulty got across this, for one of them sank and could not be extricated without considerable delay. While the men were busily employed there I rode to the head of the swamp which extended about a mile to the southward. On this swampy plain I at length succeeded in finding, with Mr. Stapylton's assistance, a line of route likely to bear the carts and we passed safely in that direction, not one carriage having gone down. While on this swampy surface we distinctly heard the breakers of the sea apparently at no great distance to the south-west, and I was convinced that the head of this swamp was about the highest ground immediately adjacent to Discovery Bay. On travelling a mile and a half further we reached a small rivulet, the first we had crossed flowing to the south. Beyond it the country appeared open and good, consisting of what is termed forest land with casuarinae and banksia growing upon it. RECROSS THE RIFLE RANGE. We had at length reached the highest parts of the range and were about to descend into the country beyond it. We continued to travel a considerable distance further than the rivulet flowing to the south. Crossing others running northward or to the left, and leaving also on the same side a swamp, we finally came to a higher range clothed with trees of gigantic size, attesting the strength and depth of the soil, and here enormous old trunks obstructed our passage, covering the surface so as to form an impediment almost as great to us as the swampy ground had been; but this large timber so near the coast was an important feature in that country. Piper, having climbed to the top of one of these trees, perceived some fine green hills to the south-east, saying they were very near us and that the sea was visible beyond them. It was late in the afternoon when I reluctantly changed my intended route, which had been until then eastward, to proceed in the direction recommended by Piper, or to the south-east and so to follow down a valley, instead of my proposed route which had been along a favourable range. HEAVY TIMBER THE CHIEF IMPEDIMENT.