From the above table it will be seen that the greater part of the interior of the Colony seen by us is absolutely useless to man or beast.  It is possible that between the Lake Darlot goldfield and the 25th parallel of latitude isolated areas of auriferous country may be found, though nothing that we saw proves this to be likely; and I base my opinion only on the facts that quartz and ironstone are known to occur in the vicinity of Lake Augusta and the Warburton Range.  It is also possible (and this I have already discussed) that a travelling route for stock may be formed from South Australia along the 26th parallel as far as Mounts Allott and Worsnop, and thence Via Lake Wells and the Bonython Creek. to the Erlistoun Creek and Lake Darlot.

Failing either the finding of gold, or the formation of a stock route from oasis to oasis, I can see no use whatever to which this part of the interior can be put.

North of the 25th parallel the country is absolutely useless until the confines of the Kimberley district (about lat. 19 degrees) are reached.  That a stock route through the desert is quite impracticable we have clearly demonstrated.  Even supposing that there was any water supply, there is no feed; nothing but spinifex grows in more than wee patches at very long intervals.  As any one who has followed me through this book can see, our water supply was most precarious, depending as we did upon rock-holes and native wells (which at any time may be found dry), and these yielded an only just sufficient quantity to keep no more than nine camels from dying for want of a drink—­every well that we found, with the exception of one or two, was drained and left empty.  Indeed on our two journeys there are only two watering-places on which I should care to depend, viz., the Empress Spring and Helena Spring.  Throughout our journey we never once found water by chance—­though chance took us to more than one dry hole—­but found it only by systematic and patient work, involving many scores of miles of tracking, the capture of the wild aboriginals, and endless hours of manual labour.  Without having resorted to these expedients I have no hesitation in saying that neither we nor the camels would be living today, for though without having done so, other parties have crossed as great an extent of arid country, it must be remembered that our journey was accomplished through infinitely worse country, and with a party exactly half as large as the smallest of the previous expeditions across the interior.  Where, with a large number of camels, it would be possible to carry a great quantity of water and do long stages, using the water for camels as well as men, with a small number such tactics as going straight ahead, and trusting to luck, could only end in disaster.