KEN-Miller,
a House-breaker, who usually, by getting into an empty House, finds Means to enter into the Gutters of Houses inhabited, and so in at the Windows, &c.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
Ken Miller in the 1811 Vulgar Tongue
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).