[22] The knights' role in the rebellion ended in the same year after the execution of Sir Gilbert de Middleton (due to his station and that of the cardinals, assaulted while on a diplomatic mission, he was hanged, drawn and quartered on 26 January)[18] and the stipulation of the Treaty of Leake on 9 August between Edward II and the Earl of Lancaster.
[23] The Treaty, however, did not last: Lancaster headed another rebellion in 1321 and was eventually defeated in the Battle of Boroughbridge, convicted of treason, and beheaded near Pontefract Castle, all in the following year.
[24] After acquiring lands in Beanley in 1320 (for which he is recorded doing homage to his overlord, Henry II Baron Percy of Northumberland, in 1324),[11] in 1322, Sir John de Lilburne was appointed Constable of Dunstanburgh Castle,[25] built by the same Thomas Earl of Lancaster for whom the knight had seized Knaresborough Castle six years prior.
[27] The garrison stationed at Dunstanburgh Castle took part in the Battle of Old Byland in North Yorkshire in 1322, and was later bolstered with 130 more men, including hobelars, providing an essential addition to the border defences against the Scots.
[28] Sir John was also recorded as Constable at Dunstanburgh in 1326, after the castle had been handed back to Thomas' brother, Henry of Lancaster, when he was commissioned as Supervisor of the Northern Ports to send all eligible ships from the North to Orewell, in Suffolk, in defence of the kingdom against Edward II's Queen, Isabella of France, as she moved to invade England.