A fragment of a medical text. A note on the first flyleaf (f. i-r) attributes authorship to one Aḥmad ibn Muḥammad Ibn Ṣāʾigh Ḥanafī (أحمد بن محمد بن صائغ حنفي), and the text makes reference to the authority of the 'Chief Shaykh' (الشيخ الرئيس, i.e., Ibn Sīnā [ابن سينا, d. 1037]), also invoking...