As the horses required a day's rest, we remained at our camp, which enabled us to repair our saddles and perform other necessary work. Repaired the chronometer and one of the aneroid barometers, which had been broken by the motion of one of the pack-horses. As there was no practicable route to the south, and the sandstone hills to the north seemed to diminish in elevation to the east, I decided on following the northern limit of the desert to the west till some line of practicable country was found by which to penetrate the country to the south. In selecting a westerly route I was also influenced by the greater elevation of the country on the western side of the Victoria, and the fact that all the larger tributaries join from that side of the valley. It is also probable that, should the waters of the interior not be lost in the sandy desert, they will follow the southern limit of the elevated tract of sandstone which occupies north-west Australia from Roebuck Bay to the Gulf of Carpentaria, both of which points are nearly in the same latitude as our present position, from which it may be assumed that the line of greatest elevation is between the 17th and 18th parallels. None of the rivers crossed by Leichhardt are of sufficient magnitude to drain the country beyond the coast range, and therefore any streams descending from the tableland to the south will either be absorbed in the sandy desert or follow the southern limit of the sandstone and flow into the sea to the south-west of Roebuck Bay. There is, however, reason to expect that, as the interior of north-west Australia is partly within the influence of the tropical and partly the extra-tropical climates, it does not enjoy a regular rainy season; and though heavy rain doubtless falls at times, it is neither sufficiently general or regular to form rivers of sufficient magnitude to force their way through the flat sandy country to the coast. Latitude by Capella 18 degrees 20 minutes 49 seconds. 11th February. At 6.30 a.m. proceeded up the creek, and at 12.30 p.m. camped at a shallow pool of rainwater on the flat, the channel of the creek being dry. On the northern bank of the creek we passed a small lagoon with a great number of duck and other water-fowl on it. The afternoon was cloudy, with a fresh breeze from south-east. Latitude by Pollux 18 degrees 15 minutes 26 seconds. 12th February. Three of the horses having strayed some distance, we did not start till 7.0 a.m., when we steered an average course of north 300 degrees east till 11.45 a.m., when we camped at a small pool of water in the bed of the creek, which was reduced to a small gully; for the first four miles we traversed the grassy flats of the creek, after which we passed over a level sandy country producing nothing but triodia, stunted eucalypti, and acacia till we again approached the creek, where the grassy flat was nearly half a mile wide, but of inferior character. Latitude by b Tauri 18 degrees 9 minutes 44 seconds.