On 9 June, Percy's patron, the Earl of Northumberland, appointed him to the Honourable Corps of Gentlemen at Arms, a mounted troop of 50 bodyguards to the King.
La 9 iunie, angajatorul lui Percy, contele de Northumberland, l-a desemnat pe acesta ca membru în Honourable Corps of Gentlemen at Arms, o unitate de cavalerie cu 50 de gărzi de corp ale regelui.