Marj, This is not my direct line, but in my database I show 2 children for Pierre Roussell and (m. Feb. 3, 1809)Catherine Taillon.Catherine was born on Jan. 24, 1796, St. Regis dioc. Quebec and was the daughter of Joseph Taillon(b. Mar. 23, 1756)and Marie Josephte Gervais (b. 1754).Their two children that I show are Marguerite Roussell (b. March 7, 1821) who marries Paul-Louis Lalonde in 1847.And Alexander Roussell who marries Elmire Lajambe.If you have or learn more I'd certainly be interested.