Help with Questions to Scarlet Pimpernel: Questions (13-18)

Questions (13-18)
13. What does Chauvelin discover when the messenger is intercepted?

14. What does Chauvelin ask Marguerite to do for him?

15. What does Marguerite go to the library to do?

16. What does Chauvelin find that proves Marguerite was in the library?

17. What does Marguerite see that reveals Percy as the scarlet pimpernel to her?

18. Who does Louise say is in her house instead of Armand?