The paper presents the results of an extensive study into double glosses employed in the Old English gloss to the Eadwine Psalter in order to verify the possible sources of this linguistically complex manuscript. The analysis shows that the affiliation of the gloss is complicated, with numerous glosses which do not belong to the established Old English psalter glossing tradition. Additionally, the results shed some light on several of the baffling questions concerning the Old English gloss to the Eadwine Psalter, such as the number of hands and the glossing practice behind the production of this manuscript. Ultimately, the paper shows that contrary to the popular opinion, the Old English gloss to the Eadwine Psalter is a valuable source of linguistic data which moreover provides information on the twelfth-century scribal practice in the post-Conquest England.