Here is an 1851/52 Census record for Gabriel Dube and Scholastique Caron, and Emerance Dube. Here is the birth record of Emerance (Emerantienne according to the priest). Emerence was born in St-Roch-des-Aulnaies, Quebec (confirmed by both census and parish records), and the census record is located in Ste Flavie, Rimouski County, Quebec. I don't know that area, so you'll have to dig a bit.