[Illustration: ANCIENT KORAN CASE. (_Escurial Library._)] Abd-er-Rahmān III. was the last great Sultan of Cordova, of the family of the Omeyyads. His son, Hakam II., was a bookworm, and although bookworms are very useful in their proper place, they seldom make great rulers. A king cannot be too highly educated; he may know everything under the sun, and, like several of the Cordovan Sultans, he may employ his leisure in music and poetry; but he must not bury himself in his library, or care more for manuscripts than for campaigns, or prefer choice bookbinding to binding up the sore places of his subjects. Yet this was what Hakam did. He was not a weak man, or at all regardless of his great responsibilities; but he was too much absorbed in his studies to care about the glories of war; and his other delight, which consisted in building, was so far akin to his studious nature that it involved artistic tastes, which are often allied to those of literature. Hakam's peaceful, studious temperament did no great harm to the State. He was son enough of the Great Khalif to lead his armies against the Christians of Leon when they did not carry out their treaties; and so overwhelming was the awe that his father had inspired, so universal the sentiment of his crushing power, that the Christian princes of the north submitted to Hakam's interference with their affairs, and one of them even came to Cordova, and with many abject genuflexions implored the aid of the Sultan to restore him to his throne. Peace was soon signed between all the parties, and Hakam had leisure to collect his famous library. He sent agents to all parts of the East to buy rare manuscripts, and bring them back to Cordova. His representatives were constantly searching the booksellers' shops at Cairo and Damascus and Baghdad for rare volumes for the Sultan's library. When the book was not to be bought at any price, he would have it copied; and sometimes he would even hear of a book which was only in the author's brain, and would send him a handsome present, and beg him to send the first copy to Cordova. By such means he gathered together no fewer than four hundred thousand books, and this at a time when printing was unknown, and every copy had to be painfully transcribed in the fine clear hand of the professional copyist. Not only did he possess all these volumes, but, unlike many collectors, he is said to have read them all, and even to have annotated them. So learned was he that his marginal notes were greatly prized by scholars of after times, and the destruction of a great part of his library by the Berbers was a serious loss to Arab literature.