Frontmatter -- Acknowledgments -- Abbreviations of Peirce's Works and Archives -- Introductory Note -- Foreword -- Contents -- General Introduction to Logic of the Future -- Introduction to the Theory of Existential Graphs and Volume 1 -- Introduction to Volume 1: History and Applications -- References -- Charles S. Peirce: Writings on Existential Graphs -- Part I: Reasoning and Diagrams -- 1. Essays on Reasoning -- 2. Diversions of Definitions -- 3. [Reasoning, Logic and Action] -- 4. Of Reasoning in General -- Part II: Development of Existential Graphs -- 5. On Logical Graphs -- 6. Positive Logical Graphs (PLG) -- 7. On Logical Graphs (Acad. Graphs) -- 8. On Logical Graphs [Euler and EGs] -- 9. [Memoir for the National Academy of Sciences on Existential Graphs] -- 10. [Six Papers on Existential Graphs] -- 11. On Existential Graphs, F4 -- 12. Peripatetic Talks -- Part III: Theory and Application of Existential Graphs -- 13. The Principles of Logical Graphics -- 14. On the First Principles of Logical Algebra -- 15. On the Basic Rules of Logical Transformation -- 16. A Proposed Logical Notation -- 17. The Simplest Possible Mathematical System -- 18. Multitude and Continuity -- 19. [A System of Existential Graphs] -- 20. Reason's Conscience -- 21. Topical Geometry -- 22. Logical Analysis of some Demonstrations in high Arithmetic -- 23. A New Deduction of the Properties of Positive Integers -- 24. A Contribution to the Amazes of Mathematics -- 25. Logical Critique of the Creed of Religion -- 26. Assurance through Reasoning -- 27. [Logical Graphs, from the Prescott Book] -- 28. [Existential Graphs, from the Logic Notebook] -- Bibliography of Peirce's References -- Catalogue of Peirce's Writings -- Name Index -- Keyword Index