When one comes to know the real value of water in a thirsty land, it almost seems like a crime on the part of Nature, that a spring should rise and flow for a comparatively short distance, to be lost in the sea. When by placing the source some fifteen or twenty miles away the course would run for hundreds of miles through a dry country. Can human ingenuity improve on nature? In this case nature seems to have laid the ground work of a great comprehensive continental plain; to have put the lever ready for man to start it, and though the scheme is one of such magnitude that it may at first glance seem widely impossible, there is no reason, backed as it would be by natural forces, that it may not be an accomplishment of the future. To fully understand the great problem of the water supply of Australia, it is necessary to comprehend and carry in mind the wonderfully unique river system of the continent. In an average area of 1,800 miles east and west, by 900 miles north and south, the whole drainage runs from north to south; that is to say, all that finds vent in the ocean. This, of course, is the surface formation carrying off the rainfall, and has no bearing on the outbreak of subterranean springs. But, as showing the upheaval of the land to the northward, it points out that naturally the flow of irrigation on a large scale will be from north to south. It may be said that from the 18th parallel there is a steady slope southward, broken only by the subordinate natural features of the country, which necessarily form the irregularities of the smaller tributaries. In this great block of more than a million and a quarter of square miles there are then all the defined channels requisite for the carriage of water throughout the heart of the continent, but with the important fact wanting that they are destitute of a constant and steady supply from the doubtful rainfall. The tilt of the northern edge of the plateau puts their sources above the level of the great springs, and causes them to be dependent on these intermittent and often scanty rains. And we know that these rains have failed in producing any comprehendable system of drainage over one third of our continent, at, least, at present with our limited knowledge, the water system appears wasteful and purposeless throughout that region. If then the underground sea that exists beneath could be, tapped as far north as possible, the water would rise to the surface at a much higher level, than would be possible elsewhere, and much greater use could be made of it, inasmuch as a larger area would lay below it for fertilization. Now, the question of the existence of this water supply at a uniform depth beneath the earth's surface can be proved by noting the existence of the springs that we know of, that have found their way without artificial aid to the light of day. Only those can be brought in evidence that are unmistakeably outside of local influence, and are unaffected by wet weather, or dry.