Around 1800 Kassanga, a Bandia leader, founded a kingdom in the Shinko valley, later called the Rafai kingdom. Kassanga was the great-grandfather of
Sultan Rafai. The Belgian officer Charles Kéthule de Ryove (1865–1903) was assigned to the Upper Uele expedition in August 1891. In March 1892 he explored the region between the Mbomou and Shinko rivers. He met Sultan Rafai, who declared his allegiance to the Congo Free State. Kéthule de Ryove was resident at Rafai's court from 1892 to 1894. He wrote in an 1895 article
Le sultanat de Rafaï (
Le Congo illustré) that almost all the inhabitants could speak Arabic, including the sultan, chiefs and soldiers. In 1894 the Belgian
Léon Hanolet ascended the
Mbari River, another tributary of the Bomu, while
Théodore Nilis ascended the Chinko River. ==Notes==