Both these mountains are composed of basalt, containing numerous crystals of peridot.
Dec.

8 .-- I travelled with my whole party over the ground which I had reconnoitred yesterday, and had to go a considerable distance farther to find water.

Along the scrubs there are generally chains of water-holes, which retain the water for a long time, and are soon filled by heavy thunderstorms; they are well puddled with clay, and, therefore, become dry almost exclusively by evaporation.

Our camp was about eight miles N.N.W.from the last.
The feed was all parched up: the native carrot, which was so green when we passed Darling Downs, was here withered and in seed.

Immense stretches of forest had been lately burned, and no trace of vegetation remained.
Partridge-pigeons were very numerous, and the tracks of kangaroos and wallabies were like sheep-walks.