Overview
- CNRS historian Victor Gysembergh identified folio 123 in the Musée des Beaux-Arts de Blois, confirming its match to 1906 photographs.
- One side preserves geometric diagrams with a largely readable passage from On the Sphere and the Cylinder, Book I, Propositions 39–41.
- The reverse shows the prophet Daniel with two lions, reportedly added around 1942, which currently prevents conventional reading of the older text.
- The discovery is published in the German Journal of Papyrology and Epigraphy, with plans for multispectral and synchrotron X‑ray fluorescence analysis pending authorization.
- The main manuscript remains with a private owner at the Walters Art Museum in Baltimore, two photographed leaves are still missing, and reunification of the rediscovered page is undecided.