Though thus bearing evidence of more extended rainfall, and of the action of water in the past, it is essentially an arid country now. Most of the minor water-courses laid down on the map are dry half of the year, or have but scattered pools of water; so a description of the surface of the country would tell us of deep river valleys, in many cases narrow and running through rocky beds, in which case we call them cañons; in other cases very wide, but having generally precipitous sides; the country often mountainous and great stretches of table-land, but generally dry and desolate, except in the immediate vicinity of rivers. The river valleys themselves are generally very fertile. Such is the country where we are to investigate native American culture. The history of the country since its first occupation by the Spaniards is not devoid of interest. It did not take the Indians of Mexico long to learn that what the Spaniards most prized was gold, and that the surest way to curry favor with them was to relate to them exaggerated stories of wonderful wealth to be gained in distant provinces. About 1530 the viceroy of New Spain (Mexico) learned from an Indian slave of seven great cities somewhere to the north; and of their wealth it was said they had streets exclusively occupied by workers in gold and silver. Though expeditions to the northern provinces of Mexico speedily dispelled the illusions in regard to them, the wonderful story of the Seven Cities flitted further north. Six years later these stories were invested with new life by the arrival in Mexico of Cabeza De Vaca and three companions. The story of their remarkable wanderings reads like an extract from a work of fiction. They were members of the unfortunate Spanish expeditions to the coast of Florida in 1528. After the shipwreck and final overthrow of the expedition, these four men had wandered from somewhere on the coast of the Gulf of Mexico, first north, and then west, passing through, probably, portions of Texas and New Mexico, until finally they were so fortunate as to meet with their own countrymen near Culiacan, in Mexico. The story they had to tell fell on willing ears. They stated to the viceroy that they had carefully observed the country through which they had passed, and had been told of great and powerful cities containing houses of four and five stories, with the usual accompaniments of great wealth.