Thursday, 23rd May, Lawson Creek. Started 7.45 a.m., course 315 degrees, with Thring, Woodforde, and seven fresh horses. At fourteen miles came across a splendid reach of water, about one hundred and fifty yards wide, but how long I do not know, as we could not see the end of it. It is a splendid sheet of water, and is certainly the gem of Sturt Plains. I have decided at once on returning, and bringing the party up to it, as it must be carefully examined, for it may be the source of the Camfield, or some river that may lead me through. On approaching it I saw a large flock of pelicans, which leads me to think that there may be a lake in its vicinity. There are mussels and periwinkles in it, and, judging from the shells on the banks, the natives must consume a large quantity. The gum-trees round it are not very large. The first ten miles of that part of the plain travelled over to-day is full of large deep holes and cracks, black alluvial soil covered with grass, with young gum-trees thicker as we approached the water. This I have named Newcastle Water, after his Grace the Duke of Newcastle, Secretary for the Colonies. Duck, native companion, white crane, and sacred ibis abound here. Returned to bring the party up to-morrow. Wind, south-east. Friday, 24th May, Lawson Creek. Started at 8 a.m. for Newcastle Water; arrived at noon. Camped. Sent Kekwick to north-east and Thring to west to see the length of it; I have had the depth tried. It is about six feet deep ten yards from the bank, and in the middle seventeen feet. I should say it was permanent. Thring found it still the same at three miles west. Kekwick returned after following it for four miles. At two miles there is a break in it. At four miles it is more of a creek coming from north-east. Gum-trees much larger. Woodforde succeeded in catching four fish about ten inches long, something resembling the whiting. I had one cooked for tea; the skin was as tough as a piece of leather, but the inside was really good, as fine a fish as I have ever eaten. To-morrow I shall follow the water to the west; its bed is limestone. Wind, south-east, with a few clouds. Latitude, 17 degrees 36 minutes 40 seconds. Saturday, 25th May, Newcastle Water, Sturt Plains. Started at 7.50 a.m. and followed the water nine miles round. It still continued, but became a chain of ponds. As I could see some rising ground north-north-east about four miles distant, I camped the party and took Thring with me to see what the country was before us. At four miles we found that the first part of the rise was stony, but on the top it was sandy table-land, covered with thick scrub. The view is obstructed to the east-north-east to north by it; but to the north-west and west there is an appearance of rising ground, thickly wooded, about twenty miles off. Wind, west. Latitude, 17 degrees 30 minutes 30 seconds.