"Deep ponds, supported by streams from the highlands immediately to the eastward, extend along their central lower flats. The lower grounds thus permanently watered present flats which furnish an almost inexhaustible range of cattle pasture at all seasons of the year; the grass and herbage generally exhibiting in the depth of winter an extreme luxuriance of growth. From these central grounds rise downs of a rich black and dry soil, and very ample surface; and as they furnish abundance of grass and are conveniently watered, yet perfectly beyond the reach of those floods which take place on the flats in a season of rain, they constitute a sound and valuable sheep pasture."
Here Cunningham halted for some time, with the view of ascertaining the practicability of a passage across the range to Moreton Bay.
In exploring the mountains immediately above the tents of the encampment, a remarkably excavated part of the main range was discovered, which appeared likely to prove available as a pass. Upon examination, the gap was found to be rugged and broken, partially blocked with fallen masses of rocks, and overgrown by scrub and jungle. Beyond these impediments, which could soon be removed, the gap now known as Cunningham's Gap was apparently available as affording a descent to the lower coast lands. Relinquishing any further attempts for the present, either through the mountains or to the western interior, Cunningham returned to the Hunter, crossing and re-crossing his outward track. He was absent oil this expedition thirteen weeks.
The following year the discoverer of the Darling Downs, accompanied by his old companion, Charles Frazer, Colonial Botanist, proceeded by sea to Moreton Bay with the intention of starting from the settlement and connecting with his camp on the Darling Downs by way of Cunningham's Gap. In this attempt he was also accompanied by the Commandant, Captain Logan. The party followed up the Logan River, and partly ascended Mount Lindsay, a lofty and remarkable mountain on the Dividing Range. They were, however, unsuccessful in finding the Gap on this occasion. Cunningham, however, immediately started from Limestone Station on the Bremer, now the town of Ipswich, and this time was quite successful. On the 24th Of August he writes:—
"About one o'clock we passed a mile to the southward of our last position, and, entering a valley, we pitched our tents within three miles of the gap we now suspected to be the Pass of last year's journey.
"It being early in the afternoon, I sent one of my people (who, having been one of my party on that long tour, knew well the features of the country lying to the westward of the Dividing Range) to trace a series of forest ridges, which appeared to lead directly up to the foot of the hollow-back of the range.
"To my utmost gratification he returned at dusk, having traced the ridge about two and a-half miles to the foot of the Dividing Range, whence he ascended into the Pass and, from a grassy head immediately above it, beheld the extensive country lying west of the Main Range. He recognised Darling and Canning Downs, patches of Peel's Plains, and several remarkable points of the forest hills on that side, fully identifying this hollow-back with the pass discovered last year at the head of Miller's Valley, notwithstanding its very different appearance when viewed from the eastern country."
The next day, accompanied by one man, Cunningham ascended the pass that bears his name. Following the ridges, they arrived in about two and three-quarter miles to the foot of the Gap.
"Immediately the summit of the pass appeared broad before us, bounded on each side by most stupendous heads, towering at least two thousand feet above it.
"Here the difficulties of the Pass commenced. We had now penetrated to the actual foot of the Pass without the smallest difficulty, it now remained to ascend by a steep slope to the level of its entrance. This slope is occupied by a very close wood, in which red cedar, sassafras, palms, and other ornamental inter-tropical trees are frequent. Through this shaded wood lye penetrated, climbing up a steep bank of a very rich loose earth, in which large fragments of a very compact rock are embedded. At length we gained the foot of a wall of bare rock, which we found stretching from the southward of the Pass.