Recently saw your posting on my D'Arche Genealogy website, http://home.pacbell.net/ddarche
I have a Stanislas in my Family Tree Maker. I do not know where I got the record and I do not see any source info. It looks like it was from a marriage index and I must have forgotten to record the source.
I have him marrying Aure-Emilie Duplin, in St-Hyppolite de Wotton, Estrie, Canada, on Oct 16, 1866. Not sure he is even connected with your Stanislas.
Feel free to email me at ddarche@pacbell and we can trade some notes!
Good Luck - Dave