In Tripoli, the Assafs had their own chief agent, Muhammad Agha Shu'ayb, who was their subordinate tax collector for the countryside of Tripoli, including the Akkar plains. Meanwhile, the Buhturids were stripped of power in 1518 when their leader was imprisoned by the authorities for failure to submit allegiance to Selim I. Thus, the Ottomans restored the Assafs to their former prominence in Mount Lebanon. In the historical account of the 17th-century Maronite patriarch and historian, Istifan al-Duwayhi, Emir Assaf died in 1518, and was succeeded by his son Hasan. Hasan and his brother Husayn had previously served as managers of their father's affairs.