The Caboceer Henry Tucker
John Newton describes a minor an African king who traded in enslaved people:
He "...has been to England, Spain and Portugal; he has six or seven wives and many sons and daughters;... His riches set him above kings... He is a fat man and fair spoken, and lives after the manner of the English, having a house well furnished with English goods... He dresses colourfully and commonly uses silver at his table..."
Thoughts upon the African Slave Trade (1808)
(Caboceer = ruler, minor king)