In latitude 28 degrees 24 minutes we again came on Streletzki Creek, and then followed it nearly south-south-west between sandy ridges to latitude 29 degrees 25 minutes, when it turned to the west and entered Lake Torrens. No permanent water was seen in the bed of the creek, though there were many deep hollows which, when once filled, retain water for several months, and this, combined with the existence of a fine reach of water in Cooper's Creek immediately above the point where Streletzki Creek branches off, renders it far the best line of route into the interior which has yet been discovered. Passing between the eastern point of Lake Torrens and what has hitherto been considered the eastern arm, but now ascertained to be an independent lake, the space between (about half a mile) was level sandy ground, covered with salicornia, without any apparent connecting channel. The course was continued south-south-west towards Mount Hopeless, at the northern extreme of the high ranges of South Australia, which had been visible across the level country at a distance of sixty miles. 26th June. As we approached the range of hills tracks of cattle and horses were observed, and eight miles beyond Mount Hopeless came to a cattle station which had been lately established by Mr. Baker. As the nature of the country we had traversed was such as not to admit of any useful deviations from it if we returned to New South Wales by land, I deemed it advisable to proceed forthwith to Adelaide, and, disposing of the horses and equipment, return with the party by sea to Sydney. ARRIVE IN ADELAIDE, SOUTH AUSTRALIA. GENERAL OBSERVATIONS. 31st July.