On June 6th, Major Warburton's tracks were seen, and a camp of his found. The next depôt formed was at the western extremity of the Macdonnell Range, at the foot of a hill named by Ernest Giles, Mount Liebig. From this depôt the party moved to the spot named by the same explorer, Glen Edith, and on their way augmented their live stock by picking up three bullocks that had been lost from Alice Springs, and apparently had started on an exploring trip by themselves. From King's Creek, their next depôt, the leader made a long excursion to the south-west, and at eighty-four miles, after passing over sandhills and spinifex country, came in sight of a hill, which, on a nearer approach, proved to be of very singular limestone formation. "When I got clear of the sandhills, and was only two miles distant, and the hill, for the first time coming fairly in view, what was my astonishment to find it was one immense rock rising abruptly from the plain; the holes I had noticed were caused by the water in some places forming immense caves. I rode round the foot of the rock in search of a place to ascend, and found a waterhole on the south side, near which I made an attempt to reach the top, but found it hopeless. Continued along to the west, and discovered a strong spring coming from the centre of the rock, and pouring down some large deep gullies to the foot. "This seems to be a favourite resort of the natives in the wet season, judging from the numerous camps in every cave. These caves are formed by large pieces breaking off the main rock and falling to the foot. The blacks made holes under them, and the heat of their fires causes the rock to shell off, forming large arches. They amuse themselves covering these with all sorts of devices--some of snakes very cleverly done, others of two hearts joined together; and in one I noticed a drawing of a creek, with an emu track going along the centre." On the return journey, he crossed an arm of Lake Amadeus, and on reaching his camp, the whole party started for Ayer's Rock, which was the name Gosse gave to the singular hill he had discovered, where they arrived safely, and one of the exploring bullocks was converted into beef. Rain having set in heavily for some days, he was enabled to penetrate some distance westward, where he came upon very good grazing country, but soon got beyond the extent of the rainfall. After many more attempts, Gosse found himself obliged to turn back, the heat of the weather and the dryness of the country--for they were now in the sandhill region-rendering it almost useless for him to think of risking his party with any hope of success.