The Holy Martyrs of Compiègne of the French Revolution

Did the sacrifice of the Carmelite martyrs
 end the Reign of Terror?

Last night I finished reading The Song at the Scaffold, the novella by Gertrud von Le Fort which tells the story of the fourteen Carmelite martyrs of Compiègne during the French Revolution. I always wonder when I'm reading historical fiction how accurate the story is. Le Fort focuses on the youngest member of the congregation, a timid and fear-filled novice, the daughter of a skeptic who supported the ideals of the revolution.

[Spoiler alert!]