13 September: Valmont writes to Merteuil. He recounts the fun he had with a certain Comtesse. She had a new lover named Vressac. Valmont does not like that he had been placed second to him, so he convinced the Comtesse to feign an argument at a dinner party they were all attending. That way, Valmont could sleep with her before she slept with Vressac. They were nearly caught the next morning, but even then, Valmont’s quick wit saved the day. He even helped Vressac and the Comtesse reconcile, which afforded him kisses from both.

11 September: Danceny writes to Cécile. He bemoans their situation but places great hope in Valmont’s help. He asks her to not judge Valmont according to her mother’s opinion of him. He is the best hope they have of being able to see one another.

14 September: Valmont writes to Cécile. The letter is included with the previous one. Valmont speaks to Cécile in the third person. He tells her he is there to help her and his friend, Danceny, overcome the injustice being done to them.