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 not met with now. The discovery in all other respects was clearly perceived to be of the utmost value, and went far to* annihilate the pet theory of an inland sea, which thus kept receding further and further from human ken. It was already evident that this noble river must play a principal part in the drainage of the western slope of the mountain ranges, and we now know that it forms the backbone of the river system of eastern Australia and the highway of intercolonial commerce. Sturt, therefore, paid Governor Darling no mean compliment in associating his name with this grand discovery and calling it the Darling River.

The expedition now followed the lead of the River Darling for about sixty-six miles. As the country continued to be inhospitable, the blacks troublesome, and the supply of water precarious, it was resolved to proceed no further in that direction. A return was accordingly made to the depôt at Mount Harris, which was reached partly by way of New Year's Creek, or the Bogan River, without any serious mishap being encountered.

Among the secondary instructions given to the expedition was a direction to push northwards, if baffled and driven back from the western interior. They had not failed in that quarter by any means, but as their work there was finished, and a good supply of provisions left, it was thought advisable to attempt a journey to the Castlereagh, which was simply known to exist. In this effort they were again