In these respects the Jews were particularly useful. Therefore Alfonso employed Jews on diplomatic missions to the courts of the Mahometan princes. One of them, the Jewish diplomatist at the court of King Alfonso, was Amram ben Isaac Ibn-Shalbib, originally Alfonso's private physician. As Ibn-Shalbib was well versed in Arabic, and possessed insight into the political circumstances of that period, the king of Castile appointed him private secretary, and entrusted him with important affairs. Alfonso had another Jewish adviser, Cidellus, who was on such intimate terms with the king, that the latter's reserve was overcome, and he permitted him to speak more freely than any of the Spanish noblemen and grandees of the empire. Alfonso, who was far from being a religious bigot, and who had acquired liberal views from his contact with the Mahometan princes, not only conferred distinctions on certain individuals among the Jews, but cleared the way to dignities and honors for all the sons of Jacob dwelling in his dominions. Alfonso had, indeed, found a certain equality in citizenship existing in many parts of Christian Spain, where custom had superseded the old Visigothic laws. According to the Visigothic code, the Jews were to be treated as outcasts, to be subjected to regulations applying to them alone, and were not to be allowed to act as witnesses. On the other hand, according to the law of custom (fueros), Christians, Jews, and Mahometans of the same town and the same country came under the same law. The Jew had to testify against the Christian on the "Torah." If Jews and Christians had a lawsuit, they had to select a Christian and a Jew as arbitrators (Alkalde). If a man wished to sell his house, two Christians and the same number of Jews had to appraise it. According to another law established by custom (fuero de Nájera), the Jews were treated on an equality with the nobles and the clergy; the same sum was fixed as compensation for the murder of a Jew, a nobleman, and a priest. Down to the smallest details of daily life, the equality between Jews and Christians before the law was made manifest. As Alfonso now confirmed these municipal laws, the civil equality of the Jews was legally acknowledged, and the ignominy of the Visigothic legislation against the Jews was effaced. Jews, under certain circumstances, were permitted to enjoy the privilege of duelling, and admitted into military service. Light seemed to be dawning upon the Middle Ages, and Roman-Christian narrow-mindedness, emanating from Theodosius II, seemed about to vanish.