THE study of mediaeval philosophy has undergone considerable change in recent years, and the developments in this field of research have been important. On all sides the soil has been turned, and just as in archaeological excavation, as at Pompeii or at Timgad, here too discoveries unexpectedly rich are rewarding our search. For such men as John Scotus Eriugena, Anselm of Canterbury, Abaelard, Hugo of St. Victor, John of Salisbury, Alexander of Hales, Bonaventure, Albert the Great, Thomas Aquinas, Duns Scotus, Siger of Brabant, Thierry of Freiburg, Roger Bacon, William of Occam, -- these are truly thinkers of the first order, and their labours are worthy of the notable studies now increasingly made of them...