Note 200 — Chapter XII · The Caliphates of El-Mansūr, El-Hādi, and Hārūn er-Rashīd
Reading edition
This powerful family took its descent from one Barmek, a physician of Balkh. One of its members, Khālid ibn Barmek, became vezīr of the first `Abbāsid Caliph, and under El-Mahdi was intrusted with the education of the heir-apparent Hārūn. Khālid’s son Yahya succeeded him as vezīr in A.H. 170 (786), and showed himself one of the most capable rulers of his age. For an account of their fall consult Sec. iii. of the Terminal Essay in vol. x. of Burton’s Thousand and One Nights.