Names of Subjects. No. of Treatises. On the _Ars Veritatis Demonstrativus_, 60 Grammar and Rhetoric, 7 Logic, 22 On the Understanding, 7 On Memory, 4 On Will, 8 On Moral and Political Philosophy, 12 On Law, 8 Philosophy and Physics, 32 Metaphysics, 26 Mathematics, 19 Medicine and Anatomy, 20 Chemistry, 49 Theology, 212 --- Total number of treatises, 486 This list is accepted without suspicion or criticism by M. Delécleuze, but as Raymond Lully did not begin writing till 1270, and as he died in 1318 at latest, this calculation requires us to suppose that he produced ten treatise every year without intermission for the space of eight and forty years, which would have been perfectly impossible for the most cloistered, book-devoted student, and Raymond Lully was a man of indefatigable activity, as the facts of his itinerant existence abundantly reveal. A writer in the _Biographie Universelle_, Paris, 1820, has the following pertinent remarks on this subject:--“Some of his biographers have extended the number of his treatises to several thousand.[M] The more moderate have reduced them from five hundred to three hundred, which lie scattered among the libraries of Majorca, Rome, Barcelona, the Sorbonne, St Victor, and the Chatreux at Paris; but scarcely two hundred can be found distinguished by their titles and the first words of the work; and this number must be still further diminished as the difference between some of them is very slight, as chapters have been given for the titles of separate works, and as the explanations of professors or disciples have often been mistaken by uncritical writers for the lessons of the master.” * * * * *