Scope and Content Correspondence with leaders in the liturgical movement including Donald Attwater, Godfrey Diekmann, Martin Hellriegel, Reynold Hillenbrand, Charles G. O'Connor, H.A. Reinhold, and many others, with members of the Congregation of Holy Cross including Theodore M. Hesburgh, and with bishops, nuns and Catholic lay men and women; manuscripts concerning liturgy by Jean Danielou, Ernst Grieshaer, Jean Guy, Johannes Hofinger, Josef Jungmann, John B. O'Connell, Damasus Winzen, Christine Mohrmann, and...