The fonds consists of familial and other correspondence of Joseph Miville Déchène, correspondence related to the Joseph Miville Déchène's election campaigns, official copies of Joseph Miville Déchène's parliamentary speeches, wills of Joseph and Maria Déchène, Social Credit publications, scrapbooks of newspaper clippings from 1923 to 1970 about the life and careers of Joseph Miville Déchène, André Miville-Déchène and their extended family, Academie Assomption yearbooks and other miscellaneous records.