Wady Halfa, Sudan (Google Maps ⧉, OpenStreetMap ⧉)
Referenced In
In Darkest Africa, Vol. 1; or, The Quest, Rescue, and Retreat of Emin, Governor of Equatoria
by Henry M. Stanley"Gordon reports to Lord Wolseley, who was then at Wady Halfa, that he can hold out for forty days yet"