There is, however, a still greater, and more singular difference alluded to in Captain Frome's report, which it is necessary to remark; I mean that of the elevation of the country. On the west side of Flinders range, for 200 miles that I traced the course of Lake Torrens, it was, as I have observed, girded in its whole course by a steep ridge, like a sea-shore, from which you descended into a basin, certainly not above the level of the sea, possibly even below it (I had no instruments with me to enable me to ascertain this,) the whole bed consisted of mud and water, and I found it impossible to advance far into it from its boggy nature. On the east side of Flinders range, Captain Frome found the lake a desert, 300 feet above the level of the sea, [Note 31: By altitude deduced from the temperature of boiling water.] and consisting of "loose and drifting sand," and "low sandy ridges, very scantily clothed with stunted scrub on their summits." Now, by referring to Captain Frome's chart and report, it appears that the place thus described was nearly thirty miles south of Mount Serle, and consequently twenty miles south of that part of the bed of Lake Torrens which I had seen from that hill. It is further evident, that Captain Frome had not reached the basin of Lake Torrens, and I cannot help thinking, that if he had gone further to the north-east, he would have come to nearly the same level that I had been at on the western side of the hills. There are several reasons for arriving at this conclusion. First, the manner in which the drainage is thrown off from the east side of Flinders range, and the direction which the watercourses take to the north-east or north; secondly, because an apparent connection was traceable in the course of the lake, from the heights in Flinders range, nearly all the way round it; thirdly, because the loose sands and low sandy ridges crowned with scrub, described by Captain Frome, were very similar to what I met with near Lake Torrens in the west side, before I reached its basin. After the Northern Expedition had been compelled to return south, (being unable to cross Lake Torrens,) the peninsula of Port Lincoln was examined, and traversed completely round, in all the three sides of the triangle formed by its east and west coasts, and a line from Mount Arden to Streaky Bay. A road overland from Mount Arden was forced through the scrub for a dray; but the country travelled through was of so inhospitable a character as to hold out no prospect of its being generally available for overland communication. One unfortunate individual has since made an attempt to take over a few head of cattle by this route, but was unable to accomplish it, and miserably perished with his whole party from want of water. [Note 32: Vide note to page 154, Vol. I. (Note 11)]