Ubangian-speaking river peoples of the great Ubangi bend — farmers, smiths and canoe traders whose twenty-metre craft dominated the waterway, and whose Bandia clan carved out ruling dynasties over the Nzakara to the east. Their speech became the base of Sango, today a national language of the Central African Republic.
Not an ending: the Ngbandi and their Yakoma and Sango kin remain the river peoples of the Ubangi, and their language underlies the CAR's lingua franca. The map hands off in 1885 to the Congo Free State on the south bank and the French Congo on the north.
One of the very few monographs dedicated to the Ngbandi specifically, from the missionary-ethnographer who documented them on the Ubangi; verified via Open Library /works/OL12289058W.
The standard Ngbandi lexicon, the reference behind the scholarship on Ngbandi as the lexifier of Sango; verified via Open Library /works/OL10758142W.