1736 Canting Dictionary / B / BLACK and WHITE [phrase]
under one's Hand, or in Writing.
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ABCDEFGHIJKLMNOPQRSTUVWXYZ
Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
Black and white in the 1811 Vulgar Tongue
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).