The Présidente de Tourvel is dead, Madame Volanges writes to Madame de Rosemonde in Letter One Hundred and Sixty-Five.
Madame de Rosemonde's lawyer writes Letter One Hundred and Sixty-Six to her to inform her that it might not be a good idea to take legal action against Danceny for the murder of Valmont, since in doing so serious evidence against Valmont would certainly be brought to light.
An anonymous author composes a letter (Letter One Hundred and Sixty-Seven) to Danceny to inform him that since he is likely to be prosecuted for Valmont's death, he should keep a low profile for a few days.
Meanwhile, Madame Volanges informs Madame Rosemonde (Letter One Hundred and Sixty-Eight) that extremely unflattering rumors have been circulating about the Marquise de Merteuil. Also, Merteuil's letters are making the rounds in Paris.
Danceny writes to Madame Rosemonde (Letter One Hundred and Sixty-Nine) to send her the correspondence from Merteuil to Valmont, with the special intention that Prévan be found innocent of the Marquise's accusations against him.
In Letter One Hundred and Seventy, Madame de Volanges tells Madame de Rosemonde that her daughter has run away to become a nun. Now she must think of something to tell the Comte de Gercourt to explain what happened to his bride- to-be when he gets back into town.