July 23.--The river had fallen a little during the night. At nine o'clock we again set forward: the country became extremely low and marshy, far more so than any we had passed over east of Macquarie's Range. These marshes extended so far southerly that to have gone round them would have led us far from our purposed course without answering any useful purpose, and although we judged that at first they might not extend above three or four miles back, yet we soon had reason to change that opinion. The river had led us upon a general course nearly east about six miles, when about half a mile from the bank southerly, a very extensive lake was formed, extending about east-south-east and west-north-west from three to four miles, and being about a mile and a half wide. Excepting the sheet of water on the north side near the termination of the stream, this was the only one we had seen that could justly be entitled to the denomination of lake. We crossed over a low wet swamp, by which its overflowings are doubtless re-conveyed to the river. This lake was joined to another more easterly, but much smaller. We could not form any correct judgment how far the marshy ground extended south-east of it; but the country was low and level as far as Mount Byng, and a low range extended north-easterly from it. We now kept the banks of the stream, till at the tenth mile we ascended a small hill a mile south of it, from which Mount Byng bore N. 12. E. Close under the hill ran a considerable branch of the river, which certainly supplied the lakes and lower grounds with water; on the other side of this arm, the country was low, and apparently marshy as far as we could see. On examination I found it would be extremely difficult to cross this branch, as the water was too shallow to swim the horses over, and the ground so soft that they could not approach the banks within several yards. I therefore determined to get upon the river nearly where this branch separated from it, and endeavour to construct a bridge, by which we might convey the provisions and baggage over: as to the horses, they could easily swim across.