Concerning Orcagna's representation of Cecco in the flames of hell, see Renan, Averroes et l'Averroisme, Paris, 1867, p.

328.
Years rolled on, and there came in the fifteenth century one from whom the world had a right to expect much.

Pierre d'Ailly, by force of thought and study, had risen to be Provost of the College of St.Die in Lorraine; his ability had made that little village a centre of scientific thought for all Europe, and finally made him Archbishop of Cambray and a cardinal.

Toward the end of the fifteenth century was printed what Cardinal d'Ailly had written long before as a summing up of his best thought and research--the collection of essays known as the Ymago Mundi.

It gives us one of the most striking examples in history of a great man in theological fetters.