For here (says the writer sarcastically) are distinguished doctors of many faculties, some of whom by their crazy ways of thinking, and still others by crazy ways of acting, others, indeed, by inflicting wounds, and still others by abusive words, furnish enjoyment that is exceeding pleasing; and (he adds more seriously) there are other Masters subtly trained in the seven liberal Arts, by whose example and teaching the entire earth, like the heavens, is adorned with stars; and some of these masters are illuminated by the three trivials and some by the four quadrivials and some by both the trivials and the quadrivials. Now the three trivials are grammar, which teaches clearly the agreement of speech; and starting from that, the youth who holds on to his first teaching makes a beginning whereby he may obtain a deeper taste of the profundities of other knowledge also; the second is rhetoric, which by the charm of its colors adorns as with pearls the subject matter, and ennobles grammar, and instils acceptably into the ears of men that which is heard; the third is logic by means of which the method of skilful deductive reasoning is assigned to the individual sciences, without which the powers of all the sciences are quiescent, and by whose addition all the sciences are regularly organized. (The letter ends with a similar description of the quadrivials.)[82] 2. TWO OXFORD LETTERS OF THE FIFTEENTH CENTURY (1) OXFORD UNIVERSITY TO THE DUKE OF GLOUCESTER, ACKNOWLEDGING A GIFT OF BOOKS. (1439.) Most illustrious, most cultured and magnificent Prince, the enduring value of the benefits you have conferred on the English nation, and the meritorious deeds of your most powerful Highness in its behalf can never die, but, with distinguished fame destined to endure, will flourish with ever-renewed praise and happy remembrance. How delightful it certainly is for us to reflect upon these again and again! Among the rest, however, that deed itself redounds to the splendor of your most mighty Highness, namely, that after having brought about the repression of heretic plotting against the church of God, you have chosen to reinvigorate the vineyard of the Lord, your hand-maid, the University of Oxford, with books on all the sciences and virtues, out of which the abundant wine of knowledge and truth may be squeezed by the press of study. For this reason we set forth in this humble letter our thanks, our praise, and our prayers, but we cannot express ourselves adequately.