1. Introduction; Part I. Contexts: 2. Inviting correction; 3. Copying, varying and correcting; 4. People and places; Part II. Craft: 5. Techniques; 6. Accuracy; 7. Writing well; Part III. Literary Criticism: 8. Diction, tone and style; 9. Form; 10. Completeness; Part IV. Implications: 11. Authorship; 12. Conclusion: varying, correcting and critical thinking; Bibliography; Index of manuscripts.