As briefly and as clearly as possible, we will endeavour to lay before the reader the chief events of this troubled epoch, when the numerous progeny of Genghis Khan warred throughout the whole extent of Central Asia, and a term was only at last placed to their restlessness by their disappearance. In the first place, it may be as well to mention, that the religions of Christ, Buddha, and Mahomed, were equally tolerated in Eastern Turkestan during the greater part of this period. The Arab invasion and the advance of Islam, had been hurled back beyond Bokhara "the Holy," by the victorious arms of the great Buddhist conqueror, Genghis Khan; and for a long period after the Mongol conquests, little was heard of attempts at conversion to the tenets of the "true Prophet." But it must not be supposed that, although Genghis Khan, in the sack of Bokhara, had almost exterminated the race of Mahomedan priests, he was disposed to stamp out the new heresy from his realms. Having crushed its power in the field, he was quite content to let it live on or die out, so long as his imperial or personal interests were not affected. So we have the strange picture before us, of the three great doctrines of the earth flourishing side by side in Eastern Turkestan in the fourteenth century. The Nestorian Christians of Kashgar, who in the time of Marco Polo were rich and flourishing, were obliged later on to succumb to the violent measures of the other members of the community, and have entirely disappeared for many centuries.