Frege

1. Early life (1848–54); 2. Education through university days (1854–74); 3. Post-doctoral research and teaching (1874–9); 4. Frege's Begriffsschrift (1879) – ideal logical language; 5. The aftermath of Begriffsschrift to Grundlagen der Arithmetik (1880–4); 6. The logical foundations of number in Grundlagen (1884); 7. Professional advancement, marriage, and the quest for objectivity in a scientific theory of meaning (1885–92); 8. Sense, reference, and psychological epiphenomena in Frege's semantics (1892); 9. Frege's culminating masterwork - Grundgesetze der Arithmetik I, II (1893/1903); 10. Academic and personal life, the review of Husserl, mathematical and philosophical correspondence (1894–1902); 11. The crucible of logicism and the crisis of Russell's paradox (1902–4); 12. Personal tragedy and a philosophical hiatus (1904–17); 13. The late essays in philosophical logic – Logische Untersuchungen (1918–23); 14. The twilight years (1923–5) and Frege's enduring legacy in mathematical logic and philosophy.