Islam were supplemented by those more mystical and emotional elements which imaginative minds soon engraft upon any creed soever; and the Mohammedan dissenter, expelled from the more rigid regions of orthodoxy, found a singularly productive soil for his doctrines in the simple minds of the Berbers. The same susceptibility to religious emotion, which had produced so general a conversion that the conquest of Spain was effected by a Berber general and twelve thousand Berber troops, soon led to further movements. The _Marabout_--saint, missionary, or priest--came to exercise a more potent influence over this credulous people than tribal chief or Arab governor could ever acquire. It needed but a few mock miracles to bring a host of gaping devotees about the shrine of the _marabout_, and so clearly had an Arab general realized this condition of popularity that, when he perceived the influence which a priestess exercised over the people by her jugglery, the subtle Moslem set to work in the same manner, and soon became an adept at legerdemain or whatever corresponded to spirit-rapping in those days, with the very best results. But a people so easily influenced by such means, a priest-ridden nation, is always liable to sudden and violent revolutions, which its priests can stimulate by a single word. The _marabouts_ among the Berbers were responsible for most of the later changes that took place in North Africa: they set up the Fatimites, sent the Almoravides victorious through Barbary and Spain, and then put them down by the Almohades. They began very early to work against the Arab governors, and when one of these had indulged his passion for luxury at the expense of a cruel oppression of his subjects, the priests set the Berbers in revolt, and in a moment the whole of the western half of the Mediterranean coast was up in arms, and the Arabs were terribly defeated. Thirty thousand fresh troops were sent from Syria to recover the provinces, but these, joined to the Arabs that still remained in Africa, were repulsed with great slaughter, and the remnant were cooped up in Ceuta, where they daily awaited famine and massacre.