The part which the Arabs took in the intellectual awakening of Europe is a familiar theme of early mediæval history. That wonderful people, drawn from what was then an unknown land of the East, and acted on by the mighty sense of religion and nationality which Mohammed was able to communicate, fell like a flood upon the weak remains of older civilisations, and made huge inroads upon the Christian Empire of the East. Having reached this point in their career of conquest they became in their turn the conquered, not under force of arms indeed, but as subdued by the still vital intellectual power possessed by those whom they had in a material sense overcome. In their new seat by the streams of the Euphrates they learned from their Syrian subjects, now become their teachers, the treasures of Greek philosophy which had been translated into the Aramaic tongue. Led captive as by a spell, the Caliphs of the Abassid line, especially Al Mansour, Al Rachid, and Al Mamoun, encouraged with civil honours and rewards the labours of these learned men. Happy indeed was the Syrian who brought to life another relic of the mighty dead, or who gave to such works a new immortality by rendering them into the Arabic language. Meanwhile the progress of the Ommiad arms, compelled to seek new conquests by the defeat they had sustained in the East from the victorious Abbassides, was carrying the Moors west and ever westward along the northern provinces of Africa. Egypt and Tripoli and Tunis successively fell before their victorious march; Algiers and Morocco shared the same fate, and at last, crossing the Straits of Gibraltar, the Moors overran Spain, making a new Arabia of that western peninsula, which in position and physical features bore so great a likeness to the ancient cradle of their race.