The basis of education in the early Middle Ages consisted, as we have seen, of the so-called seven liberal arts. Three of these, grammar, rhetoric, and logic, were grouped as the trivium; the remaining four, arithmetic, geometry, astronomy, and music, made up the quadrivium. The first group was the more rudimentary, but the second was rudimentary enough. The number was fixed and the content standardized during the decadence of ancient learning, and the whole conception reached the Middle Ages chiefly in the book of a certain Martianus Capella, written in the early fifth century. These later ages of classical antiquity, in condensing and desiccating knowledge for their own more limited intelligence, were also unconsciously preparing for later times those small and convenient packages which alone could be carried as a _viaticum_ through the stormy times of the Dark Ages. It was almost wholly as formulated in a few standard texts that the learning of the ancient world was transmitted to mediaeval times, and the authority of these manuals was so great that a list of those in use in any period affords an accurate index of the extent of its knowledge and the nature of its instruction. It was a bookish age, with great reverence for standard authorities, and its instruction followed closely the written word. In the monastic and cathedral schools of the earlier period the textbooks were few and simple, chiefly the Latin grammars of Donatus and Priscian with some elementary reading-books, the logical manuals of Boethius, as well as his arithmetic and music, a manual of rhetoric, the most elementary propositions of geometry, and an outline of practical astronomy such as that of the Venerable Bede. Of Greek, of course, there was none. This slender curriculum in arts was much enlarged by the renaissance of the twelfth century, which added to the store of western knowledge the astronomy of Ptolemy, the complete works of Euclid, and the Aristotelian logic, while at the same time under the head of grammar great stimulus was given to the study and reading of the Latin classics. This classical revival, which is noteworthy and comparatively little known, centred in such cathedral schools as Chartres and Orleans, where the spirit of a real humanism showed itself in an enthusiastic study of ancient authors and in the production of Latin verse of a really remarkable quality. Certain writings of one of these poets, Bishop Hildebert of Le Mans, were even mistaken for “real antiques” by later humanists. Nevertheless, though brilliant, this classical movement was short-lived, crushed in its early youth by the triumph of logic and the more practical studies of law and rhetoric. In the later twelfth century John of Salisbury inveighs against the logicians of his day, with their superficial knowledge of literature; in the university curriculum of the thirteenth century, literary studies have quite disappeared. Toward 1250, when a