An Arab legend puts into the Prophet's mouth a saying, which is taken by his children as a promise, that in countries where the palm-trees bear fruit his followers should possess the land; but that in countries where the palm-trees bear no fruit, though they might be dwellers for a time, the land would never be their own. The promise, if it were a promise, has been kept in the spirit for a thousand years. No date-bearing country known to the Arabs defied their arms; from no date-bearing country, once overrun, have they been yet dislodged. When Islam pushed her outposts beyond the line of palms, as in Spain and Russia, she had to fall back, after her trial of strength on the colder fields, into her natural zones. As she fell back from Granada on Tangiers and Fez, so she retired from Kazan on Khiva and Bokhara--a most unwilling retreat, the grief of which she assuaged in some degree by passionate hope of her return. The Moors, expecting to reconquer Seville and Granada, keep the keys of their ancient palaces, the title-deeds of their ancient lands in Spain. The Kirghiz, also, claim the lands and houses of their countrymen, and the Kirghiz khan describes himself as lineal heir to the reigning princes of Kazan. In the East, as in the West, the children of Islam look on their present state as a correction laid upon them by a father for their faults. Some day they trust to find fresh favor in his sight. The term of their captivity may be long; but it will surely pass away, and when the Compassionate yields in his mercy, they will return in triumph to their ancient homes. In the mean time, it is right to mark the different spirit in which the vanquished sons of Islam have been treated in the West and in the East. From Granada every Moor was driven by fire and sword; for many generations no Moor was suffered to come back into Spain, under pain of death. In Russia the Tartars were allowed to live in peace; and after forty years they were allowed to trade in the city which had formerly been their own. No doubt there have been fierce and frequent persecutions of the weaker side in these countries; for the great conflict of cross and crescent has grown into a second nature, equally with the Russian and Tartar, and the rivalries which once divided Moscow and Kazan still burn along the Kirghiz Steppe. The capitals may be farther off, but the causes of enmity are not removed by space and time. The cross is at St. Petersburg and Kief, the crescent at Bokhara and Khiva; but between these points there is a sympathy and an antipathy, like that which fights between the two magnetic poles. The Tartars have captured Nijni and Moscow many times; the Russians will some day plant their standards on the Tower of Timour Beg.