[Illustration: FERDINAND, KING OF SPAIN. [Redrawn from an old print.]] The one great unifying force was religious sentiment, stimulated into fanaticism by centuries of wars against the infidels. Nevertheless, during the two centuries before the discovery of America the Spaniards absorbed much culture from their Moorish subjects. In 1479, the whole Peninsula, except Portugal and Granada, was politically united by the accession of Ferdinand to the throne of Aragon, and of Isabella to that of Castile and Leon. With local liberties intact, and peace prevailing throughout its whole extent, the Peninsula enjoyed a prosperity unknown since the golden era of the Moors. The population rose to twelve millions; Andalusia, Galicia, Catalonia, and Valencia were among the most flourishing and thickly settled parts of Europe, while the military qualities of the aristocracy of Castile and Leon and Aragon gave the new power the best armies of the time. Colonies founded by a monarchy so organised could never be firmly knit to each other nor to the mother country. The nobility of the sword would try to establish feudal principalities; the new cities would endeavour to exercise the local functions of the old Peninsular municipalities; and the spirit of local independence still animating Catalonians, Basques, Galicians, and Andalusians would be repeated on a new continent. The only bond of union would be personal allegiance to the monarch. In the fourteenth century, Christian navigators reached the Canary Islands--sixty miles from the African coast and six hundred south-east of Gibraltar. The assurance that land did really exist below the horizon of that western ocean, so mysterious and terrible to the early navigators, gave them confidence to push farther into the deep. In navigation, the Spaniards lagged behind their Portuguese neighbours. But among the Spanish kingdoms Castile took the lead because her Andalusian ports of Cadiz, San Lucar, Palos, and Huelva faced on the open Atlantic. These towns swarmed with sailors who had followed in the track of the Portuguese and visited their new possessions. The Castilians and Andalusians were naturally jealous of the successful Portuguese. Madeira, the Azores, the Cape Verdes, and the gold mines of the Guinea coast had fallen to the latter, while the Spaniards had only the Canaries. They gave an eager ear to the rumours that were rife in the Portuguese islands of more marvellous discoveries still to be made--of islands beyonds the Azores. An adventurous Italian, Christopher Columbus, wandering among the Portuguese possessions, heard the stories. Happily for Spain, he believed them and resolved to lead an expedition to the farther side of the Atlantic. He entered her service and proved to be an enthusiast of rare pertinacity. It is immaterial whether the idea of a route to the East Indies by the west occurred to him at the same time he became convinced that there were islands in the far