On the 18th, the overseer returned with the two jaded horses we had used on our last excursion, looking very wretched and weak. The day was intensely hot, with the wind due north: the thermometer in the shade, in a well lined tent, being 105 degrees at 11 A.M. — a strong corroboration, if such were required, of the statement of the natives, that there was no large body of inland water. At 2, P.M. the wind changed to west, and the thermometer suddenly fell to 95 degrees; a little afterwards, it veered to south-west, and again fell to 80 degrees; the afternoon then became comparatively cool and pleasant.