The news of the success of the Priest-King opened a door of hope to the desponding Christian world. Pope Alexander III. determined at once to effect a union with this mysterious personage, and on the 27th of September, 1177, wrote him a letter, which he intrusted to his physician, Philip, to deliver in person. Philip started on his embassy, but never returned. The conquests of Tschengis-Khan again attracted the eyes of Christian Europe to the East. The Mongol hordes were rushing in upon the west with devastating ferocity; Russia, Poland, Hungary, and the eastern provinces of Germany, had succumbed, or suffered grievously; and the fears of other nations were roused lest they too should taste the misery of a Mongolian invasion. It was Gog and Magog come to slaughter, and the times of Antichrist were dawning. But the battle of Liegnitz stayed them in their onward career, and Europe was saved. Pope Innocent IV. determined to convert these wild hordes of barbarians, and subject them to the cross of Christ; he therefore sent among them a number of Dominican and Franciscan missioners, and embassies of peace passed between the Pope, the King of France, and the Mogul Khan. The result of these communications with the East was, that the travellers learned how false were the prevalent notions of a mighty Christian empire existing in Central Asia. Vulgar superstition or conviction is not, however, to be upset by evidence, and the locality of the monarchy was merely transferred by the people to Africa, and they fixed upon Abyssinia, with a show of truth, as the seat of the famous Priest-King. However, still some doubted. John de Plano Carpini and Marco Polo, though they acknowledged the existence of a Christian monarch in Abyssinia, yet stoutly maintained as well that the Prester John of popular belief reigned in splendor somewhere in the dim Orient. But before proceeding with the history of this strange fable, it will be well to extract the different accounts given of the Priest-King and his realm by early writers; and we shall then be better able to judge of the influence the myth obtained in Europe.