She entered a Benedictine novitiate in Zell, Minnesota, professing vows in 1890. She served at a mission school in Stephan, South Dakota until the organization was moved to the
Fort Berthold Reservation in
Elbowoods, North Dakota. The year after the move to North Dakota, Mary Catherine was elected founding prioress-general of the Congregation of American Sisters, and assumed the title Mother. The Congregation performed missionary work with the
Arikara,
Gros Ventre, and
Mandan communities. She died from tuberculosis in 1893. The Congregation of American sisters survived until 1900, with a peak membership of twelve. == References ==