[From the history of Roger commentators]

Area of Science:

• Medieval History
• Surgical History
• Manuscript Studies

Background:

• A 13th-century biblical manuscript (A 12) from Duesseldorf's library contains a hidden parchment fragment.
• The fragment features a surgical text, likely originating from Montpellier, southern France, in the late 13th century.

Discussion:

• The text references "Magister Wilhelmus de Congenis" but differs from existing editions.
• It appears to be student notes, structured by Roger Frugardi's 'Chirurgia', likely influencing William of Congenis's lectures.

Key Insights:

• This discovery presents a previously unknown example of student notes related to William of Congenis.
• It sheds light on the pedagogical methods and textual transmission of surgical knowledge in the late Middle Ages.

Outlook:

• Further analysis can illuminate the specific content and teaching practices associated with William of Congenis.
• This fragment contributes to understanding the complex lineage and commentary tradition of Roger Frugardi's surgical works.