black trader factoryn.rare (now historical) a trading station run by Africans, serving as an intermediary between African suppliers and European traders; cf. factoryn. 2a.
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1897 M. KingsleyTrav. W. Afr. xiv. 310 Here, in the black trader factory, you see the first stage of the export part of the trade.
1989 V. G. MyerVictorian Lady in Afr. xii. 137 A black trader factory was a fascinating place to stay.