The time may be approaching when we shall be able to estimate the quantity of book knowledge stored in the repositories of those empires which we call prehistoric. For the present, no clear estimate even of the great Alexandrian Libraries has been brought within the circle of popular knowledge; but it seems pretty clear that the books they contained were reckoned, at least in the aggregate, by hundreds of thousands.[7] The form of the book, however, has gone through many variations; and we moderns have a great advantage in the shape which the exterior has now taken. It speaks to us symbolically by the title on its back, as the roll of parchment could hardly do. It is established that in Roman times the bad institution of slavery ministered to a system under which books were multiplied by simultaneous copying in a room where a single person read aloud in the hearing of many the volume to be reproduced, and that so produced they were relatively cheap. Had they not been so, they would hardly have been, as Horace represents them, among the habitual spoils of the grocer.[8] It is sad, and is suggestive of many inquiries, that this abundance was followed, at least in the West, by a famine of more than a thousand years. And it is hard, even after all allowances, to conceive that of all the many manuscripts of Homer which Italy must have possessed we do not know that a single parchment or papyrus was ever read by a single individual, even in a convent, or even by a giant such as Dante, or as Thomas Acquinas, the first of them unquestionably master of all the knowledge that was within the compass of his age. There were, however, libraries even in the West, formed by Charlemagne and by others after him. We are told that Alcuin, in writing to the great monarch, spoke with longing of the relative wealth of England in these precious estates. Mr. Edwards, whom I have already quoted, mentions Charles the Fifth of France, in 1365, as a collector of manuscripts. But some ten years back the Director of the Bibliotheque Nationale informed me that the French King John collected twelve hundred manuscripts, at that time an enormous library, out of which several scores were among the treasures in his care. Mary of Medicis appears to have amassed in the sixteenth century, probably with far less effort, 5,800 volumes.[9] Oxford had before that time received noble gifts for her University Library. And we have to recollect with shame and indignation that that institution was plundered and destroyed by the Commissioners of the boy King Edward the Sixth, acting in the name of the Reformation of Religion. Thus it happened that opportunity was left to a private individual, the munificent Sir Thomas Bodley, to attach an individual name to one of the famous libraries of the world. It is interesting to learn that municipal bodies have a share in the honor due to monasteries and sovereigns in the collection of books;