Columbia subject headings:
Mahdi.
Sudan--History--1821-1881.
Harvard subject headings:
Egypt--Foreign relations--Sudan.
Great Britain--Foreign relations--Sudan.
Mahdī, Muḥammad Aḥmad, 1848-1885
Sudan--Foreign relations--Egypt.
Sudan--Foreign relations--Great Britain.
Sudan--History--1821-1881.
Sudan--History--1881-1899.
Princeton subject headings:
Mahdi.
Sudan--History--1821-1881.
Sudan--History--1881-1899.