"In the West they learnt from Plato and Aristotle and in India “Arab scholars sat at the feet of Buddhist monks and Brahman Pandits to learn philosophy, astronomy, mathematics, medicine, chemistry and other subjects.” Caliph Mansur’s (754-76) zeal for learning attracted many Hindu scholars to the Abbasid court. A deputation of Sindhi representatives in 771 C.E. presented many treatises to the Caliph and the Brahma Siddhanta of Brahmagupta and his Khanda-Khadyaka, works on the science of astronomy, were translated by Ibrahim al-Fazari into Arabic with the help of Indian scholars in Baghdad. The Barmak (originally Buddhist Pramukh) family of ministers who had been converted to Islam and served under the Khilafat of Harun-ur-Rashid (786-808 C.E.) sent Muslim scholars to India and welcomed Hindu scholars to Baghdad. Once when Caliph Harun-ur-Rashid suffered from a serious disease which baffled his physicians, he called for an Indian physician, Manka (Manikya), who cured him. Manka settled at Baghdad, was attached to the hospital of the Barmaks, and translated several books from Sanskrit into Persian and Arabic. Many Indian physicians like Ibn Dhan and Salih, reputed to be descendants of Dhanapti and Bhola respectively, were superintendents of hospitals at Baghdad. Indian medical works of Charak, Sushruta, the Ashtangahrdaya, the Nidana, the Siddhayoga, and other works on diseases of women, poisons and their antidotes, drugs, intoxicants, nervous diseases etc. were translated into Pahlavi and Arabic during the Abbasid Caliphate. Such works helped the Muslims in extending their knowledge about numerals and medicine."