Because the map-makers from time beyond reckoning have seen fit to paint the northern half of the African continent a speckled yellow, most of us have been accustomed to look upon this region as an arid, sun-baked, worthless desert. But French explorers, French engineers, and French scientists have proved that it is very far from being worthless or past reclamation. M. Henri Schirmer, the latest and most careful student of its problems, says: “The sterility of the Sahara is due neither to the form of the land nor to its nature. The alluvium of sand, chalk, and gypsum which covers the Algerian Sahara constitutes equally the soil of the most fertile plains in the world. What causes the misery of one and the wealth of the other is the absence or the presence of water.” Now, an extensive series of experiments has proven that the Sahara, like the Great American Desert, has an ample supply of underground water, which in many cases has been reached at a depth of only forty feet. There is, incidentally, hardly a desert where the experiment has been tried, whether in Asia, Africa, or America, where water has not been found within two thousand feet of the surface. Though usually not sufficient for agriculture, enough has generally been found to afford a supply for cattle, railroads, and mines. Three striking examples of what can be accomplished by scientific well-drilling in arid lands are the great wells of the Salton Desert, the flowing wells at Benson, Arizona, and a supply of seven hundred thousand gallons of water a day from the deep wells on the mesa at El Paso, each of these supplies of water being obtained from localities which were superficially hopelessly dry. It should be borne in mind, in any discussion of North Africa, that until the early '80's the Great American Desert was as primitive, waterless, and sparsely settled a region as the Sahara. Its scattered inhabitants practised irrigation and agriculture very much as the people of southern Algeria and Tunisia do to-day, and, like them, they constructed buildings of unburnt brick and stone. Though the Indian was able to find a meagre sustenance upon the American desert, just as the Arab does upon the African, it was of a kind upon which the white man could not well exist. The unconquered Apaches plundered wagon-trains and mail-coaches just as the Tuareg occasionally plunders the Saharan trade caravans to-day, and the only white men were the soldiers at scattered and lonely posts or desperadoes flying from the law. There is, indeed, a striking similarity between the conditions which prevail to-day along France's African borders and those which existed within the memories of most of us upon our own frontier.