At such a period, what one would scarcely expect to find is intellectual ambition on a very extensive scale and great variety in the branches of knowledge and in the scope of ideas. And yet it is in the thirteenth century that we meet for the first time in Europe and in France with the conception and the execution of a vast repertory of different scientific and literary works produced by the brain of man, in fact with a veritable Encyclopaedia. It was a monk, a preaching friar, a simple Dominican reader (lector qualiscumque), whose life was passed, as he himself says, by the side and under the eye of the superior-general of his order, who undertook and accomplished this great labor. Vincent of Beauvais, born at Beauvais between 1184 and 1194, who died at his native place in 1264, an insatiable glutton for books (librorum helluo), say his contemporaries, collected and edited what he called _Bibliotheca Mundi, Speculum majus_ (Library of the World, an enlarged Mirror), an immense compilation, the first edition of which, published at Strasbourg in 1473, comprises ten volumes folio, and would comprise fifty or sixty volumes octavo. The work contains three, and, according to some manuscripts, four parts, entitled _Speculum naturale_ (Mirror of Natural Science), _Speculum historiale_ (Mirror of Historical Science), _Speculum doctrinale_ (Mirror of Metaphysical Science), and _Speculum morale_ (Mirror of Moral Science). M. Daunou, in the notice he has given to it [in the xviiith volume of the _Histoire litteraire de la France,_ begun by the Benedictines and continued by the _Academie des Inscriptions et Belleslettres de l’Institut,_ pp. 449-519], disputes, not without reason, the authenticity of this last part. Each of these Specula contains a summary, extracted from the various writings which have reference to the subject of it, and the authors of which Vincent of Beauvais takes care to name. M. Daunou, at the end of his learned notice, has described the nature, the merit, and the interest of the work in the following terms: “The writings and documents which we have to thank Vincent of Beauvais for having preserved to us are such as pertain to veritable studies, to doctrines, to traditions, and even to errors which obtained a certain amount of credit or exercised a certain amount of influence in the course of ages. . . . Whenever it is desirable to know what were in France, about 1250, the tendency and the subjects of the most elevated studies, what sciences were cultivated, what books, whether ancient, or, for the time, modern, were or might have been read, what questions were in agitation, what doctrines were prevalent in schools, monasteries, churches, and the world, it will be to Vincent of Beauvais, above all, that recourse must be had.” There is nothing to be added to this judicious estimate; there is no intention of entering here into any sort of detail about the work of Vincent of Beauvais; only it is desirable to