If you are writing a story for professional purposes why haven't you tried the Royal Archives at Versailles? Click here
to access the site. Once there scroll down until you see this:
Les Archives communales de Versailles
Direction de la Culture
Grande Ecurie, 1 avenue de Paris - RP1144
78011 Versailles Cedex
Tél. : 01 39 20 67 90
Fax : 01 39 20 67 95
You know have a contact number and so forth to help you advance your research.
If you don't speak French there is an English page. You might want to contact the head archivist. Perhaps he could help you with your research. They do speak English so you won't have a problem.
Second, you might want to check out JSTOR
. This is the
place for scholars, professional historians, researchers, graduate, and undergraduate students who are looking for specific journals, articles, primary and secondary sources, etc. I've used JSTOR for my thesis and other writings as well.
Finally, try Archive.org
for more detailed information.
If you need more help let us know.