Anonymous commentary on Ṣafī al-Dīn ‘Abd al-Mu’min ibn Yūsuf ibn Fākhir al-Urmawī's (صفي الدين عبد المؤمن بن يوسف بن فاخر الأرموي, d. 1294) Book of Cycles (كتاب أدوار), an extremely influential treatise on music theory. A title line added by a later hand at the head of f. 41v identifies the tex...
