Saturday, 21st April, Gum Creek, East Side of Mount Freeling. Started at half-past seven across the scrub to another high hill. For seven miles the scrub is open, and the land beautifully grassed. At twelve miles from the camp we crossed another gum creek, coming from the range; as far as I could see it ran to the north-east. After seven miles the scrub became much thicker. We had great difficulty in getting through, from the quantity of dead timber, which has torn our saddle-bags and clothes to pieces. There are a number of gum-trees, and the new tree that was found on Captain Sturt's expedition, 1844, but mulga predominates. At fourteen miles we struck a large gum plain, but after a short time again entered the scrub. At about twenty-two miles met another arm of the gum plains, with large granite rocks nearly level with the surface. We found rain water in the holes of these rocks. At thirty-two miles crossed the sandy bed of a large gum creek divided into a number of channels; too dark to see any water. Four miles further on, camped on a small gum creek with a little rain water; the creeks are running to the north-east. The soil is of a red sandy colour: the grass most abundant throughout the whole day's journey. Occasionally we met with a few hundred yards of spinifex. Wind south-east. Native tracks quite fresh in the scrub and plain; we also passed several old worleys. Sunday, 22nd April, Small Gum Creek, under Mount Stuart, Centre of Australia. To-day I find from my observations of the sun, 111 degrees 00 minutes 30 seconds, that I am now camped in the centre of Australia. I have marked a tree and planted the British flag there. There is a high mount about two miles and a half to the north-north-east. I wish it had been in the centre; but on it to-morrow I will raise a cone of stones, and plant the flag there, and name it Central Mount Stuart. We have been in search of permanent water to-day, but cannot find any. I hope from the top of Central Mount Stuart to find something good to the north-west. Wind south. Examined a large creek; can find no surface water, but got some by scratching in the sand. It is a large creek divided into many channels, but they are all filled with sand; splendid grass all round this camp.