Nothing can afford a stronger contrast than the two rivers, Lachlan and Macquarie; different in their habit, their appearance, and the sources from which they derive their waters, but above all differing in the country bordering on them; the one constantly receiving great accession of water from four streams, and as liberally rendering fertile a great extent of country; whilst the other, from its source to its termination, is constantly diffusing and extenuating the waters it originally receives over low and barren deserts, creating only wet flats and uninhabitable morasses, and during its protracted and sinuous course is never indebted to a single tributary stream. The contrast indeed presents a most remarkable phenomenon in the natural history of the country, and will furnish matter in other parts of this Journal, for such conclusions as my observations have enabled me to form. August 22--Among the other agreeable consequences that have resulted from discovering the river in this second Vale of Tempe, may be enumerated, as not the least, the abundance of fish and emus with which, we have been supplied; swans, and ducks, were also within our reach, but we had no shot. Very large muscles were found growing among the reeds along some of the reaches; many exceeded six inches in length, and three and a half in breadth. Traces of cattle were found in various places as low as Hove's Rock, which are now doubtless straying through the country. Our horses have recruited themselves exceedingly within the last ten days, and being lightly laden, I have great hopes of being enabled to reach Bathurst before our provisions are altogether expended; we have now left but four pounds and a half of flour, and the same quantity of pork per man; our chief dependence must be on the success of our dogs for any additional supplies, and in such a country as the present, we have no fear of being in want of food.