A The Nature of Logic and the Philosophy of Mathematics.- I The Nature of Logic.- II Elementary Treatise on Logic not mathematical including philosophy of mathematical reasoning.- III [Extracts from a notebook].- B The Philosophical Interpretation of a Theory of Logic.- IV Prolegomena.- V On the Foundations of the Mathematical Theory of Logic and on the Philosophical Interpretation of Its Methods and Processes.- VI [Preparatory Notes].- VII General Summary.- C “The Philosophy of Logic” - A Sequel to “The Laws of Thought”.- VIII [Preface].- IX Table of Contents.- The Philosophy of Reasoning.- XI Logic.- D Miscellaneous Matters, Letters and Fragments.- XII On Belief in Its Relation to the Understanding.- XIII The Philosophical Idea of Freedom.- XIV Note [to Aristotle].- XV Philosophy of Mathematics.- XVI [Various fragments, apparently late].- XVII Letters to Cayley, Lubbock and Penrose.- Textual Notes.- Explanation of the description of the material.- The two Signature systems “MM” and “RS”.- The Boole/Falk List of 1896.- Details on individual documents.- Notes on the individual chapters.- I: The Nature of Logic.- II: Elementary Treatise on Logic.- III: [Extracts from a notebook].- IV: Prolegomena.- V: On the Foundations of Logic.- VI: [Preparatory Notes].- VII: General Summary.- VIII: [Preface].- IX: Table of Contents.- X: The Philosophy of Reasoning.- XI: Logic.- XII: On Belief in Its Relation to the Understanding.- XIII: The Philosophical Idea of Freedom.- XIV: Note [to Aristotle].- XV: Philosophy of Mathematics.- XVI: [Various fragments, apparently late].- XVII: Letters to Cayley, Lubbock and Penrose.- Index of Names.- Index of Subjects.