Bayhaqī, Abū al-Faḍl Muḥammad b. Ḥusayn (385–470/995–1077) (also known as Bīhaqī) was the first secretary and then head of chancellery at the Ghaznawid court, and a distinguished historian of Persia, who is best known for his classic history (see separate entry ‘Bayhaqī’s Tārīkh’). Historians and biographers refer to Abū al-Faḍl by the following honorific epithets: ‘Kh^ʷājah’, ‘Shaykh’, ‘Kātib’ (Bayh…