The Arabic{057} Period, which began with the second destruction of the Alexandrian Library--640 A.D.--ends with the fourteenth century. At the commencement of this period the Roman Empire of the West scarcely existed: the magnificent territory which composed it had been overrun and subdued by barbarous tribes from the forests of the North, while from its ruins had risen several independent kingdoms,--that of the Franks in Gallia, of the Visigoths in Spain, and of the Lombards in Italy. The last of the Western emperors of note was Justinian, whose army and generals--especially the genius and heroic devotion of Belisarius--threw some glory upon Italy, Sicily, Africa, and Spain. Meantime the Empire of the East, surrounded by enemies, and harassed from all directions, still sustained itself with vigor. The Turks had begun to show themselves on the banks of the Danube; those eternal enemies of Rome--the Persians--made incessant war; and a new and terrible enemy had sprung up in the deserts of Arabia. Then came one who was at the same time legislator, prophet, and conqueror, and united under one faith and one leader tribes hitherto divided and warring against each other. Thus arose a powerful and enthusiastic nation, animated by thirst for conquest and ardor for proselytism. In less than a century after the first preaching of Mahomet, all of Arabia, India, Syria, and Egypt were in the hands of his followers. In the year 640 Amrou effected the conquest of Egypt, seized Alexandria, and the great library of five hundred thousand volumes was, by order of Omar (successor to{058} Mahomet), delivered over to the flames; and the historian Abulpharagius declares that these books served for six months to heat the public baths, four thousand in number. Such were the first fruits of the establishment of Islam. * Happily, zeal of proselytism somewhat abated among the Mussulman princes, and religious fervor gave place to policy; so that the later Arabian caliphs showed themselves, in general, the protectors of the arts and sciences. Some, indeed, endeavored to collect the _débris_ of the scattered treasures that had been so fortunate as to escape the ignorant fanaticism of their predecessors; and others, more tolerant even than the Christian princes of the time, received without distinction all men of merit who took refuge in their State, gave them employment, and recompensed them for their services. On this account philosophers and persecuted "heretics" sought an asylum among infidels, and found there the protection which Christianity did not afford,--in return for which they gave their protectors the benefits of Greek civilization. * See a very vigorous denial of this historical statement in The Nineteenth Century, October, 1894, page 555.