What Bagdad was to Asia, Cordova was to Europe, where, particularly in the tenth and eleventh centuries, the Arabs were the pillars of literature. At this period, when learning found scarcely anywhere either rest or encouragement, the Arabians were employed in collecting and diffusing it in the three great divisions of the world. Students traveled from France and other European countries to the Arabian schools in Spain, particularly to learn medicine and mathematics. Besides the academy at Cordova, there were established fourteen others in different parts of Spain, exclusive of the higher schools. The Arabians made the most rapid advancement in all the departments of learning, especially in arithmetic, geometry, and astronomy. In the various cities of Spain, seventy libraries were opened for public instruction at the period when all the rest of Europe, without books, without learning, without cultivation, was plunged in the most disgraceful ignorance. The number of Arabic authors which Spain produced was so prodigious, that many Arabian bibliographers wrote learned treatises on the authors born in particular towns, or on those among the Spaniards who devoted themselves to a single branch of study, as philosophy, medicine, mathematics, or poetry. Thus, throughout the vast extent of the Arabian empire, the progress of letters had followed that of arms, and for five centuries this literature preserved all its brilliancy. 5. GRAMMAR AND RHETORIC.--The perfection of the language was one of the first objects of the Arabian scholars, and from the rival schools of Cufa and Bassora a number of distinguished men proceeded, who analyzed with the greatest subtlety all its rules and aided in perfecting it. As early as in the age of Ali, the fourth Caliph, Arabian literature boasted of a number of scientific grammarians. Prosody and the metric art were reduced to systems. Dictionaries of the language were composed, some of which are highly esteemed at the present day. Among these may be mentioned the "Al Sehah," or Purity, and "El Kamus," or the Ocean, which is considered the best dictionary of the Arabian language. The study of rhetoric was united to that of grammar, and the most celebrated works of the Greeks on this art were translated and adapted to the Arabic. After the age of Mohammed and his immediate successors, popular eloquence was no longer cultivated. Eastern despotism having supplanted the liberty of the desert, the heads of the state or army regarded it beneath them to harangue the people or the soldiers; they called upon them only for obedience. But though political eloquence was of short duration among the Arabians, on the other hand they were the inventors of that species of rhetoric most cultivated at the present day, that of the academy and the pulpit. Their philosophers in these learned assemblies displayed all the measured harmony of which their language was susceptible. Mohammed had ordained that his faith