By defining Uganda`s northern border as the Kafu River, the Colvile Agreement of 1894 formalized Uganda`s promise to receive certain areas in exchange for their support for the Bunyoro.  Two of the “lost counties” (Buyaga and Bugangaizi) were returned to the Bunyoro after the 1964 referendum on the lost Ugandan provinces.  Done in English and Luganda at Mengo, Kingdom of Uganda, March 10, 1900. . . .