Transatlantic slavery was responsible for the largest, long-distance, forced migration in history. But, since Europeans did not venture into the interior until after abolition, how did around 12 million Africans fall into their clutches? This programme delves into history and finds that, contrary to popular belief, most of the business was conducted by black slave merchants trading on the coast with Europeans Title Time watch - the African trade. Published London : BBC., 1997. Episode 12 S1997E1 Physical Description 1 videodisc (VHS) (49 min.) : sd., col. ; 4 3/4 in.