During the winter months of 1825, being again bent on travel, Cunningham started for a northern tour. Leaving Parramatta, he crossed the Hawkesbury and proceeded towards Wollombi, one of the tributaries of the Hunter River. Still pushing ahead he reached Mount Danger, then Pandora's Pass, and entered upon the Liverpool Plains. These he now found to be a region of swamps and marshes as the consequence of a rainy season. Having crossed this district as best he could, the ardent traveller pressed on through Camden Valley and reached Dunlop's Head, at no great distance from the River Darling, which, with a little presentiment, he might soon have discovered and anticipated Captain Sturt. But as the country was now beginning to dip perceptibly, being in many places covered with water, which had accumulated during recent wet weather, he deemed prudence the better part of valour, and abandoned a hopeless enterprise. He was again in his own home by the 17th of June, having travelled in all about 700 miles. After a short season of rest, during which New Zealand was visited, this untiring scientist returned to the colony and offered himself for further exploration with renewed zest and zeal. The time was opportune, for the Governor had been anxiously looking about for a suitable leader to conduct an expedition to the distant north. Cunningham's offer was therefore eagerly accepted, and ample provision made for his requirements. All things being ready, the start was made on the 30th of April, 1827, with six picked men and eleven heavily-laden horsemen. The route skirted the western flank of the Liverpool Plains, and by the 11th of May the party entered upon ground hitherto untrodden by civilized man. A fine valley now opened to view, and was named the Stoddart, in remembrance of an old friend of the explorer's. The Namoi River was next forded, and by the 25th the hilly country on the west had sunk into the plain. The scene that now lay before them will be best described in the words of the leader of the expedition. "A level open interior of vast expanse, bounded on the north and north-west by a distant horizon, broke suddenly on our view. At north-west, more particularly, it was evident to all of us that the country had a decided dip, and in that bearing the line of sight extended over a great extent of densely wooded or brushed land, the monotonous aspect of which was here and there relieved by a brown patch of plain; of these some were so remote as to appear a mere speck on the _ocean_ of land before us, on which the eye sought anxiously for a rising smoke as indicative of the presence of the wandering aborigines, but in vain; for, excepting in the immediate neighbourhood of a river of the larger magnitude, these vast solitudes may be fairly said to be almost entirely without inhabitants. We had now all the high grounds on our right, or to the east of us, and before us, to the north, a level wooded country." These plains which ran out