The party now retraced their steps to the eastward, disgusted with the want of success that had attended their efforts, and the dreary monotony of their surroundings.
"There is a uniformity in the barren desolateness of this country which wearies one more than I am able to express. One tree, one soil, one water, and one description of bird, fish, or animal prevails alike for ten miles and for one hundred. A variety of wretchedness is at all times preferable to one unvarying cause of pain or distress."
On the 4th of August, being then satisfied of their position on the river, and knowing that a further course along its bank would only lead them amongst the swamps that had stayed their downward journey, it was determined to strike to the northeastward, in order to avoid this low country and, if possible, reach the Macquarie River and follow it up to the settlement of Bathurst. After experiencing some difficulty in manufacturing a raft out of pine logs, whereby to cross their baggage over, Oxley and his party left the Lachlan.
They endured for some time a repetition of their struggles in the south for grass and water, and then the explorers reached fertile and well-watered country; and, on the 19th of August, halted on the bank of the Macquarie, which river Oxley found to equal his fondest hopes. They now turned their steps homeward, and arrived at Bathurst on the evening of the 29th of August.
Convinced that, in the Macquarie, he had now discovered the highway into the interior, Oxley writes:—
"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 diminishing 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."
Oxley having successfully carried through the Lachlan expedition, was at once selected to command a similar one down the Macquarie, on which, now that the former river had so disappointed expectations, men's hopes were fixed. Oxley seems to have been particularly unhappy in his deductions, every guess hazarded by him as to the future utility of the country he passed over, or the probable nature of the farther interior, was incorrect; and now the Macquarie was to refuse to bear his boat's keel to the westward; after the same manner as the Lachlan.
In those days men had not yet mastered the idea that the physical formation of Australia was not to be worked out on the same lines as that of other countries; they looked vainly for a river with a wide and noble opening, and none being found on the surveyed coast, conjecture placed it far away in a few leagues of unexplored shore line on the north-west. The constancy with which the southern coast had been examined, precluded all idea from men's minds that the entrance to this long sought river was there. No, it must be yet undiscovered to the westward. Wentworth says:—
"If the sanguine hopes to which the discovery of this river (the Macquarie) has given birth, should be realised, and it should be found to empty itself into the ocean on the north-west coast, which is the only part of this vast island that has not been accurately surveyed, in what mighty conceptions of the future greatness and power of this colony, may we not reasonably indulge? The nearest distance from the point at which Mr. Oxley left off, to any part of the western coast, is very little short of two thousand miles. If this river, therefore, be already of the size of the Hawkesbury at Windsor, which is not less than two hundred and fifty yards in breadth, and of sufficient depth to float a seventy-four gun ship, it is not difficult to imagine what must be its magnitude at its confluence with the ocean: before it can arrive at which it has to traverse a country nearly two thousand miles in extent. If it possess the usual sinuosities of rivers, its course to the sea cannot be less than from five to six thousand miles, and the endless accession of tributary streams which it must receive in its passage through so great an extent of country will without doubt enable it to vie in point of magnitude with any river in the world."
It may, therefore, well be imagined that it was in a most sanguine spirit that Oxley undertook his second journey.