Under the Western Khalifate, Seville flourished in spite of the assaults and internecine warfare of which it was frequently the theatre. When in 888 Andalusia became temporarily split up into several nominally independent states, the city acknowledged the sway of Ibrahim Ibn Hajjaj. The chronicler Ben Hayán, often quoted by Señor de Madrazo, describes this prince as keeping up imperial state and riding forth attended by five hundred horsemen. He ventured to assume the _tiraz_, the official garb of the Amirs of Cordova. To his court flocked the poets, the singers, and the wise men of Islam. Of him it was written, “In all the West I find no right noble man save Ibrahim, but he is nobility itself. When one has known the delight of living with him, to dwell in any other land is misery.” Flattery did not blind the sagacious Ibn Hajjaj to the insecurity of his position, and he bowed before the rising star of the new Khalifa, Abd-er-Rahman III. In 913 Ishbiliyah opened her gates to that powerful ruler and again became subject to Cordova. The city lost nothing by its timely submission. The generous and beneficent Khalifa narrowed and deepened the channel of the Guadalquivir, thus rendering it navigable. He introduced the palm tree from Africa, planted gardens, and adorned the city with splendid edifices. Much of the splendour of the Court of Cordova was reflected on Seville, which certainly rivalled the capital as a seat of learning. Among its citizens was Abu Omar Ahmed Ben Abdallah, surnamed _El Begi_ or “the Sage,” the author of an encyclopædia of sciences, which was long esteemed as a work of marvellous erudition. According to Condé, Abdallah was frequently consulted by the magistrates, even in his early youth, in affairs of the gravest import.