Under the second ruler of the Almoravide dynasty, Ali (1106-1143), the Jews not only lived in peace, but some of them were entrusted with the collection of the poll-tax from Jewish and Christian inhabitants, and distinguished men received posts of honor at the court. Science and poetry were the qualifications for high dignities. A Jewish physician and poet, Abu Ayub (Solomon Ibn-Almuallem), of Seville, was the court-physician of the Caliph Ali, and bore the titles of prince and vizir. Alcharizi says that his verses rendered eloquent the lips of the dumb, and illuminated the eyes of the blind. The physician Abulhassan Abraham ben Meïr Ibn-Kamnial, of Saragossa, likewise occupied a high post at Ali's court, and also bore the title of vizir. The greatest poets of the time celebrated his nobility of soul, his generosity and his interest in the welfare of his co-religionists: "A prince who treads the earth, but whose aim is in the stars. He hastens like the lightning to do good, whilst others only creep along. The gates of his generosity are open to his compatriots and to strangers. Through his fortune he saved those doomed to death, and rescued the lives of those doomed to destruction. The prince (Ibn-Kamnial) is a protection and a guard unto his people; he dwells in Spain, but his loving-kindness reaches unto Babylon and Egypt." Abu Ishak Ibn-Mohajar also bore the title of vizir, and was similarly immortalized by the poets. The prince Solomon Ibn-Farussal, likewise praised by his contemporaries, appears to have been in the service of a Christian prince, and was entrusted with an embassy to the court of Murcia. Shortly before the battle of Ucles, at which the Mahometan forces obtained a signal victory over those of the Christians, Ibn-Farussal was murdered (1108, 20th Iyar--2nd May). The young Jehuda Halevi, who had composed a song of praise for the reception of the vizir, had to change it into an elegy on the mournful news of the vizir's murder. An astronomical writer, Abraham ben Chiya Albargeloni (b. 1065, d. 1136), occupied a high position under another Mahometan prince. He was a sort of minister of police (Zachib as-Schorta), and bore the title of prince. He was held in high consideration by several rulers on account of his astronomical knowledge, and he debated with learned priests, to whom he demonstrated the accuracy of the Jewish calendar. But he also practised the pseudo-science of astrology, and drew a horoscope of favorable and unfavorable hours of the day. He calculated in the same way that the Messiah would appear in the year 5118 of the world (1358 C. E.).