This study examines the activity of a fifteenth-century Byzantine scribe, identified by Sofia Kotzabassi as the historian Doukas, a figure still shrouded in mystery. The paper provides an overview of the manuscripts so far attributed to this scribe and introduces new textual and palaeographical evidence supporting Kotzabassi’s identification. Among the key contributions is the discovery of the scribe’s hand in the margins of the manuscript Paris. gr. 1267, which allows for a deeper understanding of the sources used by the historian Doukas. An appendix includes a transcription of the annotations by the so-called ‘scribe of Doukas’ and a detailed description of the content of Paris. gr. 1267. The study aims to shed further light on Doukas’s role in the Byzantine manuscript tradition and to offer new perspectives for palaeographical and historical research.