Frontmatter -- Acknowledgments -- Contents -- Abbrevations of Peirce's works -- Introduction -- Texts -- 1 The Essence of Reasoning -- 2 That Categorical and Hypothetical Propositions are one in essence, with some connected matters -- 3 Minute Logic -- 4 Reason's Rules -- 5 On the Foundations of Mathematics -- 6 Logical Tracts. N° I. On Existential Graphs -- 7 [Principles of Logic] -- 8 [Logic Notebook] -- 9 Notes on Portions of Hume's Treatise of Human Nature -- 10 The Basis of Pragmaticism -- 11 [Logic] -- 12 Amazing Mazes. The Fourth Curiosity -- 13 Logic. Chapter 1. Common Ground -- 14 Significs and Logic -- 15 The Rationale of Reasoning -- 16 Of Reasoning in general -- 17 Notes Preparatory to a Criticism of Bertrand Russell's Principles of Mathematics -- 18 Fragments -- References