Crossed and camped on east corner of dry lake Marcourgannie, and on the margin of the dry lake Merradaboodaboo; the bulk of this last lake bearing north from this and splendidly grassed. Tuesday, December 31. Started at 6.30 a.m. to Appacalradillie lake, through side of Lake Merradaboodaboo; passed several flooded flats proceeding east from last-named dry lake--the first of which was an extensive one, passing on our course from left round to the right and apparently round to south as far as visible, then over alternate and indifferent flats and large sandhills--a considerable deal of flooded land to the westward. At fifteen miles arrived on top of a very prominent sandhill which I have named Mount MacDonnell, from which hill opens out to our view two beautiful lakes which, in honour of her Ladyship and His Excellency the present Governor of South Australia, I have named respectively Lake Blanche and Lake Sir Richard, separated by a small sandy rise through which passes a small channel that connects them, and which I have named New Year's Straits. Wednesday, January 1, 1862. Started at 6.45 round the first lake, Blanche (Lady MacDonnell) to where the creek passes through a low sandhill and connects it with the other lake, Sir Richard (His Excellency the Governor). The first-named of these lakes is, where it was tried, between five and six feet deep and seven and three-quarter miles in circumference, nearly circular, bare of timber, and tens of thousands of pelicans on it, one solitary swan, with innumerable other birds, gulls and ducks of various kinds (one new and one dark brown large-winged), cormorants, avocats, white spoonbills, crows, kites, pigeons and magpies of various kinds, and plenty of fish. The other lake immediately adjoins and its south-east end is more to the eastward than Lake Blanche, it is nearly circular and is six and three-quarter miles in circumference, but when casually tried was not quite five feet deep; pelicans, birds of kinds, fish, etc., as the other. Between forty and fifty men (natives) came to meet us as we were passing round the lakes at the creek, which they had all to swim and, from the appearance of the camp some short distance off, there could not have been less than about 150, all apparently friendly. Started from north-west end of Lake Sir Richard and went along the course of the creek that fills these lakes on a bearing of 305 degrees for ---- miles; then south-south-west half a mile to a fine basin of water in the valley of the creek, three-quarters of a mile wide and more than that in length, and opening again and contracting alternately up to Lake Blanche which, in honour of the veteran explorer, I have named Sturt's Ponds; abundance of fish and fowls. From this point course 308 degrees up the creek for four miles; at two miles a creek went off to the right through a flooded flat, thence on a course varying from 224 to 239 degrees, principally