north-west quicker than the waters of the river, which had almost an imperceptible motion, I was therefore at once convinced that it was not permanent, but had lodged there in the night, during which much rain had fallen. I next pushed my way through the reeds into the marsh, and at length clearly perceived that the waters which were perfectly sweet, after running several courses, flowed off to the north, towards which point there was an apparent declination or dip. Finding it impossible to proceed further, I regained the boat, and thence returned to the camp, under a conviction that I had reached the very spot, at which Mr. Oxley lost the channel of the river in 1818. The next day I moved to the place where Mr. Hume had struck upon the channel of the river, but was again doubtful in what direction to proceed. The marsh, at the commencement of which we now found ourselves, being the third from Mount Foster, but the second great one, seemed to extend beyond us to the north for many miles, but varying in breadth. In the evening I went in the boat up the channel, and found it at first, deep and sullen, as that of the river above. It soon however, narrowed, and the weeds formed over its surface, so that I abandoned the boat and walked along a path up it. I had not gone far when the channel divided; two smaller channels came, the one from the southern, and the other from the western parts of the marsh into it. There was an evident declination where they were, and it was at their junction the river again rallied and formed. On my return to the camp, Mr. Hume and I went down the river, but found that about a mile it lost itself, and spread its waters ever the extensive marsh before it. In this extremity, I knew not what movement to make, as Mr. Hume had been checked in his progress north. I therefore determined to ascertain the nature of the country to the eastward and to the westward, that I might move accordingly; I proposed to Mr. Hume, to take a week's provisions, with two attendants, and go to the north-east, in order again to turn the marsh, but with the expectation that the angle formed by the junction of the Castlereagh with the Macquarie would arrest its progress, as the last was fast approaching the former.