This is really an exciting story, but it might happen that the whole thing about deadly duels, killed men etc. is more or less fiction.
Check one important source:
Parfaict Dictionnaire (1767) (1)http://cesar.org.uk/cesar2/books/parfai ... &index=350
A lot of details about her life, theater carrier, appearance, but nothing on duels, just a short remark:
"La passion que Mlle Maupin avoit pour les exercises des armes et l'abitude fréquente oú elle étoit de s'habiller en homme, ont donné lieu a plusiers histoires vrais ou fausses qu'on raconte d'elle, mais comme elles sont la plupart dans un gout romanesque et peu necessaire a notre sujet , nous ne jugeons pas a propos de les rapporter."
"The passion that Ms Maupin had for exercises of arms, and frequent occasions where she was to dress as a man, gave rise to true or false stories about her, but since they are mostly a little bit too romantic in taste, and not needed to our subject, we don't judge necessary to report them". Not a very perfect translation, but it generally conveys the meaning of French text, which was written about 60 years after her death.
In order to compensate for this disappointment: read about the bout between "black Mozart" (Chevalier de Saint-George) and Chevalier d'Eon.
(1) The Cesar Project:
CESAR is a dynamic resource at the service of all those with an interest in the French theatre of the seventeenth and eighteenth centuries — students, researchers, scholars, enthusiasts.
Nullo modo, amice.
"Ulrich von Lichtenstein"