This fictitious embassy arose from the fact that Colonel Paterson having refused Barallier the required leave, King claimed him as his aide-de-camp, and sent him on this embassy.

Barallier started with four soldiers, five convicts, and a waggon-load of provisions drawn by two bullocks.

He crossed the Nepean and established a depot at a place known as Nattai, whence the waggon was sent back to Sydney for provisions, Barallier, with the remainder of his men and a native, pushing out westwards.

After this preliminary examination he returned to the depot, and made a fresh departure on the 22nd of November, and, continuing mostly directly westwards, he reached a point (according to his chart) about one hundred and five miles due west from Lake Illawarra.

If this position is even approximately correct, he must have been at the very source of the Lachlan River.
I give a few extracts from his diary, which was not even translated until the Historical Records of New South Wales were collected by Mr.F.M.
Bladen.