“Whoever enters this river [Rio dos Forcados] will find that it branches to the right and to the left; five leagues up the left branch is a place of barter, which consists chiefly of slaves and cotton cloths, with some panther skins, palm-oil and some blue shells with red stripes which they call "coris." These and other things we buy there for brass and copper bracelets; they are all valuable at the castle of S. Jorze da Mina, where the King's factor sells them to the negro merchants for gold.”