elegant copies of these autographs, he allowed the owners to retain the fifteen talents (more than L3000 sterling) which he had pledged with them as a princely security. As the Museum, where the library was originally founded, stood near the royal palace, in that quarter of the city called Brucheion, all writings were at first deposited there; but when this building had been completely occupied with books, to the number of 400,000, a supplemental library was erected within the Serapeion, or Temple of Serapis, and this gradually increased till it contained about 300,000 volumes--making in both libraries a grand total of 700,000 volumes. The Alexandrian Library continued in all its splendor until the first Alexandrian war, when, during the plunder of the city, the Brucheion portion of the collection was accidentally destroyed by fire, owing to the recklessness in the auxiliary troops. But the library of the Serapeion still remained, and was augmented by subsequent donations, particularly by that of the Pergamean Library of 200,000 volumes,[19] presented by Mark Antony to Cleopatra, so that it soon equalled the former, both in the number and in the value of its contents. At length, after various revolutions under the Roman Emperors, during which the collection was sometimes plundered and sometimes reestablished, it was utterly destroyed by the Saracens at the command of the Caliph Omar, when they acquired possession of Alexandria in A. D. 642. Amrou, the victorious general, was himself inclined to spare this inestimable treasury of ancient science and learning, but the ignorant and fanatical caliph, to whom he applied for instructions, ordered it to be destroyed. "If," said he, "these writings of the Greeks agree with the Koran, they are useless, and need not be preserved; if they disagree, they are pernicious, and ought to be destroyed." The sentence of destruction was executed with blind obedience. The volumes of parchment or papyrus were distributed as fuel among the five thousand baths of the city; but such was their incredible number, that it took six months to consume them. This act of barbarism, recorded by Abulpharagius, is considered somewhat doubtful by Gibbon, in consequence of its not being mentioned by Eutychius and Almacin, two of the most ancient chroniclers. It seems inconsistent, too, with the character of Amrou, as a poet and a man of superior intelligence; but that the Alexandrian Library was thus destroyed is a fact generally credited, and deeply deplored by historians. Amrou, as a man of genius and learning, may have grieved at the order of the caliph, while, as a loyal subject and faithful soldier, he felt bound to obey.