The poet, the astronomer, and the historian, raised to posts of high political responsibility, enjoyed the confidence and the intimate familiarity of the monarch in whose presence the most distinguished soldiers trembled. Such was the grateful tribute paid by imperial power to intellectual pre-eminence. That this extraordinary favor should not be abused could scarcely have been expected from even the strongest understandings when subjected to the temptations of flattery and ambition. The lessons of philosophy were insufficient to correct the ignoble vices inseparably incident to human nature, and which, in all ages, have exercised despotic influence over the mind of man. The insolence and rapacity of these ministers rendered them offensive to the people; their dangerous aspirations eventually excited the fears of the sovereign. No class of men was so universally detested. The ancient chronicles are filled with accounts of their cruelty, their injustice, and their misfortunes. Some were sacrificed to the jealousy of their master, others fell victims to the unreasoning fury of the populace. Few there were who retained, in the midst of greatness, those virtues and that modesty which should always characterize the noble pursuit of letters, success in which had raised these statesmen to places of such consideration and authority. While the Koran, as interpreted by the more rigid Mussulman theologians, discourages scientific inquiry and the study of natural philosophy, the Khalifs of Cordova, in more than one instance, incurred the reproach of heterodoxy through the indulgence of investigations prohibited by law to their subjects, and, thus encouraged, the intelligent society of the capital did not disdain to adopt the noble maxim of the head of a rival sect. which declares that “the ink of the learned is as precious as the blood of the martyrs,” while the consistent believer kept constantly in remembrance the statement of the Prophet that on the Day of Judgment a rigid account will be required of the literary opportunities improved or abused by the Faithful. Not only did these great princes encourage literature by the bestowal of substantial honors and rewards, but they themselves won in that field laurels more profitable and enduring than any gained in the most successful campaign against the infidel. Abd-al-Rahman I. was an astronomer and a poet of unusual ability. Hischem I. and Al-Hakem I. were among the best informed scholars and critics of their time. The talents and learning which rendered illustrious the life and character of Abd-al-Rahman II., his acquaintance with the sciences of law and natural philosophy, his patronage of letters, caused him to be compared to Al-Mamum, the most renowned of the Khalifs of Bagdad. The erudition and acquirements of Al-Hakem II. were prodigious; the volumes of the immense library of Cordova were enriched by notes and comments in his own hand, and