Nov. 17.--We travelled four or five miles through Banksia, and Melaleuca-gum forest, crossed several rocky creeks; and followed down the largest of them; which in its whole extent was exceedingly rocky. The rock was generally in horizontal layers. There were many high falls in the bed, which compelled me to leave the creek, and proceed on the rising ground along its banks, when suddenly the extensive view of a magnificent valley opened before us. We stood with our whole train on the brink of a deep precipice, of perhaps 1800 feet descent, which seemed to extend far to the eastward. A large river, joined by many tributary creeks coming from east, south-east, south-west and west, meandered through the valley; which was bounded by high, though less precipitous ranges to the westward and south-west from our position; and other ranges rose to the northward. I went on foot to the mouth of the creek; but the precipice prevented my moving any farther; another small creek was examined, but with the same result. We were compelled to move back, and thence to reconnoitre for a favourable descent. Fortunately the late thunder-storms had filled a great number of small rocky basins in the bed of the creek; and, although there was only a scanty supply of a stiff grass, our cattle had filled themselves sufficiently the previous night to bear a day's privation. In the afternoon, Charley accompanied me on foot in a northerly direction (for no horse could move between the large loose sandstone blocks), and we examined several gullies and watercourses, all of a wild and rocky character, and found it impossible to descend, in that direction, into the valley. Charley shot a Wallooroo just as it was leaping, frightened by our footsteps, out of its shady retreat to a pointed rock. Whilst on this expedition, we observed a great number of grasshoppers, of a bright brick colour dotted with blue: the posterior part of the corselet, and the wings were blue; it was two inches long, and its antennae three quarters of an inch.