1. Introduction
2. The ?Postscript? to the Letter to James Bernoulli, dated April, 1703
3. ?Historia et Origio Calculi Differentialis?
4. Manuscripts of the period 1673?1675
5. Manuscripts of the period 1676, 1677, and a later undated manuscript
6. Gerhardt's Essay, Leibniz in London, with three Manuscripts of Leibniz
7. Gerhardt's Essay, Leibniz and Pascal, with letters to Tschirnhaus and M. de l'Hospital and a manuscript of Leibniz
8. Conclusions