Electronic Gneuss-Lapidge Content Porphyrius, Isagoge, trans. Boethius (f) Name Porphyrius, Isagoge, trans. Boethius (f) Contained in: 795 - Bern, Burgerbibliothek, C. 219 (4) (with Leiden, Universiteitsbibliotheek, Voss. lat. Q. 2, fol. 60)