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  • Doctor Rock, a vendor of medicines, selling his wares from a horse-drawn carriage to a crowd at Kennington common: John and Charles Wesley are preaching in the background. Engraving, 1743.
  • Doctor Rock, a vendor of medicines, selling his wares from a horse-drawn carriage to a crowd at Kennington common: John and Charles Wesley are preaching in the background. Engraving, 1743.