Résumé :
At the end of the twelfth century an anonymous annotator wrote a large amount of scholia in the margins of the MS Vat.gr. 2125 (Codex Marchalianus) containing the Prophets. Here some sample annotations concerning the books of Jeremiah and of Hosea are examined: they are re-written excerpts from biblical Catenae and other patristic commentaries. The scholiast could be identified with John X Kamateros, patriarch of Constantinople.