1. Idungus of Prüfung, Cistercians and
Cluniacs: the Case for Cîteaux [A Dialogue between Two
Monks; an Argument on Four Questions], ed. and tr. J. OSullivan
and J. Leahey (Kalamazoo, 1977), II: 52, pp. 93-4.
2. Patrologia Cursus Completus Series
Latina, ed J. P. Migne (221 vols., Paris, 1844-65), CLXXXIX,
col. 112 ff (Petrus Venerabilis, Epistolarum libri sex (XXVIII);
cited in F. Mullin, A History of the Cistercians in Yorkshire (Washington,
1932).