26 September: Cécile writes to Valmont. She thanks him for his help but feels the idea with the key is too dangerous. She would rather wait. She is sure that he will still find ways to pass letters.

26 September: Valmont writes to Danceny. He informs him that it is not his fault that things are progressing slowly: Cécile is too timid to put his plans into effect. He tells Danceny he should try and influence her if that is what he wants.

27 September: Tourvel writes to Valmont. She pleads for him to leave. She admits her feelings for him, which she knows she must not have. She cannot give in. She asks in the spirit of friendship that they stop talking about love.