Astute observation – Derby Mercury  26 June 1794:

ANECDOTE. Mr. NEWTON, when formerly captain of a Guinea trader, charging one of his negroes with a theft, the latter denied it. The master doubting the veracity of his slave; this poor, dark, untutored, uncivilized creature, whom we proud Europeans will hardly admit in the same scale of creation with ourselves, reflecting on what he had witnessed in the conduct of our religious slave trades, replied with a look of contempt, Do you think I am a Christian?