flat extended over about fifty miles, and was bounded by the elevations that continued easterly from the left bank of the Murray to the north, and by a line of rising-ground to the south. The whole was lightly wooded, and covered with grass. The season must have been unusually dry, judging from the general appearance of the vegetation, and from the circumstance of the lagoons in the interior being wholly exhausted. Thirty-three days had now passed over our heads since we left the depot upon the Morumbidgee, twenty-six of which had been passed upon the Murray. We had, at length, arrived at the grand reservoir of those waters whose course and fate had previously been involved in such obscurity. It remained for us to ascertain whether the extensive sheet of water upon whose bosom we had embarked, had any practicable communication with the ocean, and whether the country in the neighbourhood of the coast corresponded with that immediately behind our camp, or kept up its sandy and sterile character to the very verge of the sea. As I have already said, my hopes on the first of these points were considerably damped, but I could not help anticipating a favourable change in the latter, since its features had so entirely changed. DETAINED BY THE WIND. The greatest difficulty against which we had at present to contend was the wind; and I dreaded the exertion it would call for, to make head against it; for the men were so much reduced that I felt convinced they were inadequate to any violent or prolonged effort. It still blew fresh at 8 p.m., but at that time it began to moderate. It may be imagined that I listened to its subdued gusts with extreme anxiety. It did not wholly abate until after 2 a.m., when it gradually declined, and about 3 a light breeze sprung up from the N. E. We had again placed sticks to ascertain with more precision the rise of tide, and found it to be the same as in the river. In the stillness of the night too we thought we heard the roaring of the sea, but I was myself uncertain upon the point, as the wind might have caused the sound. From the top of the hill from which we had obtained our first view of the lake, I observed the waves breaking upon the distant headland, and enveloping the cliff in spray; so that, independent of the clearness of the horizon beyond it, I was further led to conclude that there existed a great expanse of water to the S.W.; and, as that had been the direction taken by the river, I thought it probable that by steering at once to the S.W. down the lake, I should hit the outlet. I, consequently, resolved to gain the southern extremity of the lake, as that at which it was natural to expect a communication with the ocean would be found. GEOLOGICAL FORMATION.