The lake where it was visible, appeared, as it had ever done, to be from twenty-five to thirty miles across, and its distance from Mount Hopeless was nearly the same. The hills to the S. and S. W. of us, seemed to terminate on the eastern slopes, as abruptly as on the western; and from the point where we stood, we could distinctly trace by the gum-trees, the direction of watercourses emanating from among them, taking northerly, north-easterly, easterly and south-easterly courses, according to the point of the range they came from. This had been the case during the whole of our route under Flinder's range. We had at first found the watercourses going to the south of west, then west, north-west, north, and now north-east, east and south-east. I had, at the same time, observed all around this mountain mass, the appearance of the bed of a large lake, following the general course of the ranges on every side, and receiving, apparently, the whole drainage from them. On its western, and north-western shores, I had ascertained by actual examination, that its basin was a very low level, clearly defined, and effectually inclosed by an elevated continuous sandy ridge, like the outer boundary of a sea-shore, its area being of immense extent, and its bed of so soft and yielding a nature, as to make it quite impossible to cross it. All these points I had decided positively, and finally, as far as regards that part of Lake Torrens, from near the head of Spencer's Gulf, to the most north-westerly part of it, which I visited on the 14th of August, embracing a course of fully 200 miles in its outline. I had done this, too, under circumstances of great difficulty, toil, and anxiety, and not without the constant risk of losing my horses, from the fatigues and privations of the forced labours I was obliged to impose upon them. Having ascertained these particulars, and at so much hazard, relative to Lake Torrens, for so great a part of its course, what conclusion could I arrive at with regard to the character of its other half to the north-east, and east of Flinders ranges, as seen from Mount Hopeless, and Mount Serle points, nearly ninety miles apart! The appearances from the ranges were similar; the trend of all the watercourses was to the same basin, and undoubtedly that basin, if traced far enough, must be of nearly the same level on the eastern, as on the western side of the ranges. I had completely ascertained that Flinders range had terminated to the eastward, the north-east, and the north; that there were no hills or elevations connected with it beyond, in any of these directions, and that the horizon every where was one low uninterrupted level.