We travelled in a north-easterly direction for eleven miles, and reached a spring called Wallala, which we dug out, and so obtained sufficient water for our horses.

I may mention here that Colonel Warburton and other explorers who endeavoured to cross the great inland desert from the east had the advantage of being provided with camels--a very great advantage indeed in a country where the water supply is so scanty and uncertain as in Central Australia.

As we ascertained by painful experience, a horse requires water at least once in twelve hours, and suffers greatly if that period of abstinence is exceeded.

A camel, however, will go for ten or twelve days without drink, without being much distressed.

This fact should be remembered, because the necessity of obtaining water for the horses entailed upon us many wearying deviations from the main route and frequent disappointments, besides great privation and inconvenience to man and beast.
The 19th was Sunday, and, according to practice, we rested.