Farmers Slang & Its Analogues. 18901909, rev. 2022.
Beauchamp
AS BOLD AS BEAUCHAMP, phr. (old).A proverbial expression, said to have originated in the valour of one of the Earls of Warwick of that name. [See NARES, 48; MIDDLETONS Works, ii. 411; Brit. Bibl., i. 533.]