 He represented Montmagny in the Legislative Assembly of Quebec as a Nationalist member from 1908 to 1916.His surname is given as "La Vergne" by some authoritative sources, including his National Assembly of Quebec biographical page, although these same sources spell his father's name as "Lavergne".He was born in Arthabaska, Quebec in 1880, the son of Joseph Lavergne and Émilie Barthe, who was the daughter of Joseph-Guillaume Barthe.