[6] He also copied the Psalms for a nun and noblewoman named Scotta, including marginal notes on variations in the Hebrew text.
[5] Nicolaus' magnum opus, the Suffraganeus bibliothecae (meaning 'aid to the Bible'), is a commentary on the literal sense of the Old Testament.
[3] It is most famous for its theoretical introduction, in which outlines the three ways in which a text can become corrupted in copying (addition, substitution, omission) with examples of each.
In the commentary itself, Nicolaus cites Jerome, Pseudo-Jerome, the Glossae biblicae vaticanae, Rashi, Abraham ibn Ezra and Hugh of Saint Victor's De sacramentis.
[5] During his Cistercian period, Nicolaus wrote the Libellus de corruptione et correptione Psalmorum, a critical study of the text of the Latin Psalter.