From Inquiries into the Process and Origin of the Science of Heraldry in England by James Dalloway, p130
Engraving of Guy Beauchamp, earl of Warwick, standing over the beheaded corpse of Piers Gaveston, earl of Cornwall, 1330. Taken from the Rous Rolls. Gaveston’s shield bears his arms (vert six eaglets displayed or, 3, 2, and 1). Beauchamp’s banner, which is possibly sable an orle argent, is not his coat of arms; it may be a mark of cadency.