As we now know, there are several of them with spaces of traversable ground between, instead of the obstacle being one continuous circle by which he supposed he was surrounded.

In consequence of his inability to overcome this obstruction, Eyre gave up the attempt to penetrate into Central Australia, but pushing westerly, round the head of Flinders' Spencer's Gulf, where now the inland seaport town of Port Augusta stands, he forced his way along the coast line from Port Lincoln to Fowler's Bay (Flinders), and thence along the perpendicular cliffs of the Great Australian Bight to Albany, at King George's Sound.
This journey of Eyre's was very remarkable in more ways than one; its most extraordinary incident being the statement that his horses travelled for seven days and nights without water.

I have travelled with horses in almost every part of Australia, but I know that after three days and three nights without water horses would certainly knock up, die, or become utterly useless, and it would be impossible to make them continue travelling.

Another remarkable incident of his march is strange enough.

One night whilst Eyre was watching the horses, there being no water at the encampment, Baxter, his only white companion, was murdered by two little black boys belonging to South Australia, who had been with Eyre for some time previously.