Columbia subject headings:
Harvard subject headings:
Espionage, British--Islamic countries.
Spies--Middle East--Diaries.
Wahhābīyah--History.
Princeton subject headings:
Islamic sects.
Muḥammad ibn ʻAbd al-Wahhāb, 1703 or 1704-1792.
Saudi Arabia--History.
Wahhābīyah--Controversial literature.
Wahhābīyah--History.