mainpernour

The father espieing it, would néeds sée what it was: and though the sonne humblie denied to shew it, the father being more earnest to sée it, by force tooke it out of his bosome; and perceiuing the contents thereof, in a great rage caused his horsses to be sadled out of hand, and spitefullie reproouing his sonne of treason, for whome he was become suertie and mainpernour for his good abearing in open parlement, he incontinentlie mounted on horssebacke to ride towards Windsore to the king, to declare vnto him the malicious intent of his complices.

Chronicles (3 of 6): Historie of England (1 of 9) Henrie IV Raphael Holinshed