E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
White Witch (A).
A cunning fellow; one knowing in white art in contradistinction to black art.
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“Two or three years past there came to these parts one … what the vulgar call a white witch, a cunning man, and such like.”—Sir W. Scott: Kenilworth, chap. ix.
