Prover
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In old English law
A person who; on being indicted of treason or felony, and arraigned for the same, confessed the fact before plea pleaded, and appealed or accused others, his accomplices, in the same crime, in order to obtain his pardon.
4 Bl. Comm. 329, 330.