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An episode in King Henry VI, part II: Margerie Jourdayne with others conjure up a diabolical spirit in the hope of revealing to Humfrey Duke of Gloucester the results of competing claims to the English crown. Colour stipple print by C.G. Playter and R. Thew after J. Opie, 1796. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.