Upon studying "Evangeline", Longfellow's poem which follows an Acadian girl during the time of the Expulsion of the Acadians. Lauvrière discovered, on this occasion, the history of the Acadian people, and reoriented his scholarly interest. This new research subject led him to publish "La Tragédie d'un peuple; histoire du peuple acadien de ses origines à nos jours" (Paris: Bossard, 1922).