With regard to the actual knowledge of Latin literature possessed in the Middle Ages, it may be said in brief that Virgil was continually studied, and that a certain familiarity with Ovid, Lucan, Horace, Juvenal, and Statius was never lost. Among the prose-writers, portions of Cicero were used in education; but the compilations of Boethius, Priscian, Donatus, and Cassiodorus were more widely used. In the twelfth century the study of Roman law was revived, and the scholastic habit of thought found scope for subtlety in the discussion of cases and composition of glosses. The general knowledge and intellectual sympathy required for comprehension of the genuine classics were, however, wanting; and thus it happened that their place was taken by epitomes and abstracts, and by the formal digests of the Western Empire in its decadence. This lifeless literature was better suited to the meagre intellectual conditions of the Middle Ages than the masterpieces of the Augustan and Silver periods. Of Greek there was absolutely no tradition left.[17] When the names of Greek poets or philosophers are cited by mediæval authors, it is at second hand from Latin sources; and the Aristotelian logic of the schoolmen came through Latin translations made by Jews from Arabian MSS. Occasionally it might happen that a Western scholar acquired Greek at Constantinople or in the south of Italy, where it was spoken; but this did not imply Hellenic culture, nor did such knowledge form a part and parcel of his erudition. Greek was hardly less lost to Europe then than Sanskrit in the first half of the eighteenth century. [Footnote 17: Didot, in his _Life of Aldus_, tries to make out that Greek learning survived in Ireland longer than elsewhere.]