«Legi in quodam beati Columbani libro»: Raterio di Verona e Bobbio

Clues by an anonymous reader of manuscript Clm 6340, inserting several notes in its margins around XIIIth-XIVth century, led to the identification of the source of a quotation in the Discordia (Ep. 29) by Ratherius of Verona. The text is the Opus imperfectum in Matthaeum, for a long time assigned to John Chrysostom. Ratherius had probably the opportunity to read it in a manuscript of the Bobbio library, belonging to a branch of the tradition named "family 3" by the editor J. Van Banning. The hypothesis of contacts between Verona and the Bobbio library gets thereby further confirmed.