Editio princeps of the O.F. translation of Albucasis (ms. BNF fr. 1318), with introduction and glossary. The text, hitherto neglected, is important as one of the earliest medieval vernacular surgical treatises (dating from c. 1270); and because the Albucasis translation goes back (via a medieval Latin version) to an Arabic original; finally, as an example of Lorraine non-literary prose. The distinctively Lorraine text contains not only numerous first attestations of medical technical terms in French, but also a quantity of previously unrecorded Arabicisms.