My Mother's family(Surname: Levasseur) owned a lumber company in St Eleuthere. The whole town burnt down and the moved to the US. That's about all I know. Can you provide more information?
Family and genealogical history is typically outside the purview of this subreddit (that being said, someone might have some information, who knows?). You might wanna try the folks over at /r/Genealogy though; they are likely better equipped to handle this sort of request.
Perhaps also try /r/quebec? there may be members who know something about the town's history