Wikipedia (English): Abd al-Hafid of Morocco

The English Wikipedia article on Abd al-Hafid of Morocco (between 1875 and 1880 – 4 April 1937), Sultan of Morocco 1908–1912, covering the Hafidiya, his signing of the Treaty of Fes and his abdication; its text states that after abdicating he turned to Sufism, joining the Tijaniyya and writing on it, and that before 1912 he was under Salafiyya influence.