A Chronicle of England - Page 280 - Gaveston's Head Shown to the Earl of Lancaster, James William Edmund Doyle, 1864
The head of piers gaveston, 1st earl of cornwall, is delivered to thomas, 2nd earl of lancaster; humphrey de bohun, 4th earl of hereford; and edmund fitzalan, 9th earl of arundel, for inspection. Date: 1864.