The blog Medieval Manuscripts Provenance, operated by Peter Kidd under the alias mssprovenance, was once regarded as a casual resource for bibliographic curiosities in the field of manuscript studies. In its early years, the blog presented auction highlights, scattered notes on codicological features, and updates on manuscript leaves appearing in the antiquarian trade. Over time, however, the blog's function evolved. As Prof. Carla Rossi and the Organisation pour la Protectio