BUSSA, a town of Borgu, Northern Nigeria, on the west bank of the Niger, in 1o° 9' N., 4° 40' E. It is situated just above the rapids which mark the limit of navigability of the Niger by steamer from the sea. Here in 18o6 Mungo Park, in his second expedition to trace the course of the Niger, was attacked by the inhabitants and drowned while endeavouring to escape. During 1894-98 its possession was disputed by Great Britain and France, the last-named country acknowledging by the convention of June 1898 the British claim, which carried with it the control of the lower Niger. In 1925 a new town was laid out on a more sanitary site, and the old town gradually deserted. (See BoRGU.)