Thanks for the tip, pinestick! I actually came across some more information for Emilie, which I haven't gotten the chance to post yet: She was born in St. Gabriel de Brandon in D'Autray, Quebec. Her birth date was definitely August 15, 1855. I still don't know her parents' names, but her father was from St. Anne de la Pocatiere and her mother was from St. Scholastique.
So I don't think Ludger Therrien and Emelie Lacharite are the couple I'm looking for. But, again, thank you!