Such, indeed, has been the sterile and desolate character of the wilderness I have traversed, and so great have been the difficulties thereby entailed upon me, that throughout by far the greater portion of it, I have never been able to delay a moment in my route, or to deviate in any way from the line I was pursuing, to reconnoitre or examine what may haply be beyond.  Even in the latter part of my travels, when within the colony of Western Australia, and when the occasionally meeting with tracts of a better soil, or with watercourses appearing to have an outlet to the ocean, rendered the country one of much greater interest, I was quite unable, from the circumstances under which I was placed, the reduced and worn-out state of my horses, and the solitary manner in which I was travelling, ever to deviate from my direct line of route, either to examine more satisfactorily the character of the country, or to determine whether the watercourses, some of which occasionally bore the character of rivers (though of only short course), had embouchures opening to the sea or not.

In a geographical point of view, I would hope the result of my labours has not been either uninteresting, or incommensurate with the nature of the expedition placed under my command, and the character of the country I had to explore.  By including in the summary I am now making, the journeys I undertook in 1839, as well as those of 1840-1 (for a considerable portion of the country then examined was recrossed by the Northern Expedition), it will be seen that I have discovered and examined a tract of country to the north of Adelaide, which was previously unknown, of about 270 miles in length, extending between the parallels of 33 degrees 40 minutes and 29 degrees S. latitude.  In longitude, that part of my route which was before unknown, extends between the parallels of 138 degrees E., and 118 degrees 40 minutes E., or about 1060 miles of direct distance.  These being connected with the previously known portions of South-western, South-eastern, and part of Southern Australia, complete the examination of the whole of the south line of the coast of this continent.  Indeed, I have myself (at various times) crossed over the whole of this distance from east to west, from Sydney to Swan River.  In the early part of the Expedition, 1840, the continuation of Flinders range, from Mount Arden, was traced and laid down to its termination, near the parallel of 29 degrees S. It was ascertained to be hemmed in by an impassable barrier, consisting of the basin of an immense lake, which I named Lake Torrens, and which, commencing from the head of Spencer’s Gulf, increased in width as it swept to the north-west, but subsequently bent round again to the north-east, east and south-east, in correspondence with the trend of Flinders range, the northern extremity of which it completely surrounded in the form of a horse-shoe.  The shores of this lake I visited to the westward of Flinders range, at three different points, from