Khwaja Abu Malik Isami is the author of Futuh-al-Salatin is yet another elaborate account of the Delhi Sultanate. It consists of almost 12,000 verses. The Futuh-us-Salatin is a history of Muslim rule in India until 1349-50.
Al Biruni was made court astrologer in Ghazni and he accompanied with Mahmud on his invasions on India. He lived for several years here and is considered to be first Indologist.
Each sarkar of Sher Shah Suri was divided into several parganas. Shiqdar (military officer), Amil (land revenue), Fotedar (treasurer), and Karkuns (accountants) were the officers in charge of the administration of each pargana.