September 13.--We were too anxious to find a passage across this river (for such we now perceived it to be), to permit us to rest this day. We proceeded on a variety of courses to avoid the deep ravines or glens which conducted numerous small streams of water to the principal one. Our road was very rugged, and our elevation sometimes very considerable, every part heavily timbered. Our course, which led us chiefly west, now terminated at one of the most magnificent waterfalls we had ever seen. The water was precipitated over a perpendicular rock at least one hundred and fifty feet in height in one unbroken sheet, falling into a large reservoir about one third down the whole declivity: hence it wound its way through the glen for about half a mile farther, when it joined the main stream. This grand fall was called Beckett's Cataract, in honour of the Judge Advocate General. It now commenced raining so heavily that we were obliged to stop on the spot, though by no means an eligible situation. We had not seen any place where there had been the slightest possibility of descending; but as we were not many miles from the river which we crossed on Wednesday last, we knew that this rugged country must soon end. September 14.--The weather preventing us from proceeding, parties were sent out to search the banks of the glen, for a place by which to descend and cross it. Two of the people traced it up so far as to ascertain that the river which we had crossed on Wednesday was the same which had so embarrassed us. It entered the glen in a fall of vast height: above, there was no difficulty in crossing it, the country being clear and open, and of moderate height. A kangaroo was chased to this fall, down which he leapt and was dashed to pieces; like the hero of Wordsworth's "Hartleap Well." It is wonderful that the dogs escaped the same fate. We had been also successful in finding a passage nearer to the tent. About a mile above Beckett's Cataract, a pass was discovered by which we might descend, and the opposite side appeared equally favourable. It appears that we have been hitherto deceived respecting the magnitude of the river which runs through the glen, owing to the vast height from which it was viewed, and to our being seldom within a mile of it. The geologist would here have a most interesting field for research, and would doubtless be enabled to account for those natural phenomena, which, from their defiance of all rule, perplex us so greatly. These mountains abound with coal and slate. The dip of the rocks on this side (the north) of the glen, is about twenty degrees to the west.