subs. phr. (old).—A Grand Jury.

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  c. 1696.  B. E., A New Dictionary of the Canting Crew, s.v. IGNORAMUS … also, We are Ignorant, written by the Grand Jury on Bills, when the Evidence is not Home, and the Party (thereupon) Discharged.

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  1725.  A New Canting Dictionary, s. v.

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