Pyrenees from those above described until we reach Catalonia; but in the lower valley of the Ebro, where rain is rare, in the Bardenas reales of Navarre, and in the monegros, or despoblados of Aragon, we meet with a phenomenon only too frequent in Spain--tracts of almost utter barrenness. The Bardenas reales are low spurs of the Pyrenees, with table-lands, bluffs, and deep gorges, and these could scarcely be brought under cultivation; but the "despoblados" (dispeopled lands) of Aragon might be irrigated, either by the Ebro or by its tributaries, if the water of the canal of Charles V. were but economically applied. The sterility of some parts seems to have been the slow result of an oppressive land tenure; for as Don Vicente de la Fuente has remarked, the lands which belonged to the ancient senors (the feudal lords) lie barren, while the lands of the comunidades, the free districts, are still fertile. In treating, of the cultivation and the products of eastern and southern Spain two facts become evident at once--how many of the products are exotic, and how much of the cultivation is still Arabian. We shall see in another chapter how deep a mark the Moor or Arab has left on the population and toponymy of Spain; and the agriculture of the greater part of central and southern Spain is still Arabian. The methods of the Spanish peasant are almost all Arabian; often he uses the Arabian hoe in preference to the Roman plough. The _noria_, or water-wheel; the _sha'doof_, or swipe, the pole and bucket for lifting water; the huge dams and reservoirs, the canals and ditches (_acequias_), the regulations for the fair distribution of the water,--all these, and even the very superstitions as to times of sowing, the rotation of crops, the treatment of his animals--for all these the Spanish peasant of the South is indebted to the Moors. The treatise of Abu Zaccaria, with its traditions of Nabathean agriculture, is still one of the manuals of agriculture in Spain. It is the Moors, too, who first made the winter gardens in the sands near San Lucarde Barameda, at the mouth of the Guadalquiver, and which supply Cadiz and Seville with the earliest and latest vegetables. The Roman, with his lofty aqueducts, brought water to the towns; but it was the Moor who gave that blessing to the thirsty soil of the country districts of Spain. And not only the methods of agriculture, but many of its fruits and products were introduced by the Arab from the East, and some of these are now the very staple of Spanish produce. It is they who brought into Spain the cotton plant, rice, and the sugar-cane; mulberries, both for fruit and for silk culture; sesame, the caper, the locust bean, the castor-oil plant, alfalfa (lucerne), the pomegranate, almond, the walnut and filbert, the chestnut and the ever-green oak, the wild olive, the jujube, the pistacchio nut, the palm, several kinds of roses, the wall-flower, with many another garden herb or flower. It was they who