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INTRODUCTION

additional matter, especially a list of magical books. This list should be compared with the list given in the Letter on the Secret Works of Nature original: "Epistola de Secretis Operibus Naturae" (edited by Brewer, pages 531-32). It should also be compared with the list in the Mirror of Astronomy original: "Speculum Astronomiae". That work is generally ascribed to Albertus Magnus, but Father Mandonnet attributes it to Roger Bacon.¹

The division of Moral Philosophy into six parts corresponds with the division in the printed text of the Greater Work original: "Opus Majus" so far as the latter goes; that is, to the end of the fourth part. The summary of the fourth part in the Third Work original: "Opus Tertium" shows that the text edited by Bridges of this part in the Greater Work is essentially complete. The summary of the lost fifth part adds some details to the summary already given in Chapter 14 of Brewer’s edition of the Third Work.² The subject of the sixth part was the administration of justice by the law courts, but this was never written: "I excused myself from the explanation of this part."³ original Latin: "excusavi me ab expositione istius partis"

From two passages in the Third Work (edited by Brewer, page 305; edited by Duhem, page 164; below, page 61) it appears that Bacon was at first unable to send a corrected copy of the last portion of Moral Philosophy to the Pope. "What I have written about anger is clear, because I have corrected and marked those things. Other things that follow are not so clear, because they are not corrected or marked; for this reason I am now sending a corrected copy." original Latin: "Quae de ira scripsi plana sunt, quia correxi illa et signavi. Alia vero quae sequuntur non ita patent, quia non sunt correcta nec signata; propter quod modo mitto exemplar correctum." "But I could not correct these other things at another time because of too many responsibilities. And therefore I now send a corrected copy, so that John and his associates may correct the things that remained uncorrected." original Latin: "Sed hec alias non potui corrigere propter superfluitatem occupationum. Et ideo nunc mitto exemplar correctum, ut Johannes cum suis sociis corrigat ea que remanserunt incorrecta." The original version was corrected as far as the end of the section on anger; this reaches to page 298 in the edition by Bridges. A revised version was prepared of the remainder. Does the Digby manuscript (the only independent copy we have of this part) represent the corrected or the original version? The text by Dr. Bridges does not help us to decide this question. "The errors in the Seneca quotations," he says in a note to Volume 2, page 365, "are so numerous that to embody

¹ Albertus Magnus, Complete Works original: "Opera Omnia" (edited by Boignet, Paris), volume 10, page 629 and following; Mandonnet, Siger of Brabant original: "Siger de Brabant", 2nd edition (Louvain, 1908-10), and "Roger Bacon and the Mirror of Astronomy" original: "Roger Bacon et le Speculum Astronomiae" in the Neo-Scholastic Review of Philosophy original: "Revue Néo-Scolastique de Philosophie", August, 1910.
² Page 52; see also page 308 in the same work.
³ Page 76 below; see also the Third Work original: "Op. Tert.", edited by Brewer, page 52.