he paper discusses the results of a study into almost 2000 corrections found in the Old English gloss to the first 50 Psalms of the Eadwine Psalter, a post-Conquest manuscript produced in mid-twelfth century. It contains the three Latin versions of the Psalter translated by St. Jerome, each accompanied by a gloss: the Gallicanum – Latin, the Romanum – Old English, and the Hebraicum – Anglo-Norman. The exact purpose behind the production of this psalter, its role, as well as the reason for introducing extensive corrections to the Old English gloss remain unknown. By making the corrections the focal point of the study, the present paper builds a case for identifying Thomas Becket (or his associates) as the patron of the Eadwine Psalter, which seems to provide comprehensive answers to some baffl ing questions concerning this manuscript.