Hello, 
 About Sartine, that is my impression as well, and I have left a note in the francophone Wikipédia to that effect.
 I do very much enjoy these little mysteries, but I am a little bit apprehensive at not being able to answer some of your inquiries; I suppose that this is inevitable at the granularity level we are reaching, but I would much rather have bottomless sources from which to quecnh our thrist.
 I have been unable to find anything on Coromandel, and none of the number of Modeste seem to match, unfortunately. On the other hand, I am going to put up a little article for Henriette with what I have. Cheers!