Following the removal of the Despensers, Mortimer set to work restoring the status of his supporters, primarily in the Marches, and hundreds of pardons and restorations of property were made in the first year of the new king's reign. Rich estates and offices of profit and power were heaped on Mortimer. He was made constable of
Wallingford Castle and in September 1328 he was created
Earl of March. However, although in military terms he was far more competent than the Despensers, his ambition was troubling to all. During his short time as ruler of England he took over the lordships of
Denbigh,
Oswestry and
Clun (the first of which belonged to Despenser, the latter two had been the Earl of Arundel's). He was also granted the
marcher lordship of Montgomery by the queen. During the
War of Saint-Sardos, the Regent and his queen spent over £60,000 bankrupting the Treasury, even after the proscriptions of Arundel and the Despensers. The Lancastrian opposition were incensed by this casual display of irresponsible government. The jealousy and anger of many nobles were aroused by Mortimer's use of power, which in many ways was tenuous. In 1328
Simon de Mepham, reportedly a Lancastrian at court, was elected Archbishop of Canterbury without controversy. However, the feuding would not stop. The day Parliament opened on 15 October Thomas of Lancaster's nemesis, Sir Robert Holland was murdered by highway robbers. Whereupon March swore on Mepham's cross that he knew nothing of it. Nonetheless, the King decreed an indictment; he would be judged at law against the standards of the Magna Carta. With Parliament adjourned on 31 October, he was able to slip away to his estates on the Marches. The two earls' lethal enmity, and enforced absence from the King's presence, rendered their motives almost equally suspect to rowdy Londoners. The young king would have to raise an army of archers if he was to defend his throne from a northern rebellion controlled by Lancaster. In charge of the army, Lancaster blamed Mortimer and his queen for the debacle, and the highly contentious
Treaty of Edinburgh–Northampton with the Scots. "
Henry, Earl of Lancaster, one of the principals behind Edward II's deposition, tried to overthrow Mortimer, but the action was ineffective as the young king passively stood by. Then, in March 1330, Mortimer ordered the execution of
Edmund, Earl of Kent, the half-brother of Edward II. After this execution Henry Lancaster prevailed upon the young king, Edward III, to assert his independence. In October 1330, a Parliament was summoned to
Nottingham, just days before Edward's eighteenth birthday, and Mortimer and Isabella were seized by Edward and his companions from inside
Nottingham Castle via an underground tunnel. In spite of Isabella's entreaty to her son, "Fair son, have pity on the gentle Mortimer", Mortimer was conveyed to the Tower. Accused of assuming royal power and of various other high misdemeanours, he was condemned without trial and
hanged at Tyburn on 29 November 1330, his vast estates forfeited to the crown. His body hung at the gallows for two days and nights in full view of the populace. Mortimer's widow Joan received a pardon in 1336 and survived until 1356. She was buried beside Mortimer at Wigmore, but the site was later destroyed. In 2002, the actor
John Challis, the owner of the remaining buildings of Wigmore Abbey, invited the BBC programme
House Detectives at Large to investigate his property. During the investigation, a document was discovered in which Mortimer's widow Joan petitioned Edward III for the return of her husband's body so she could bury it at
Wigmore Abbey. Mortimer's lover Isabella had buried his body at
Greyfriars in Coventry following his hanging. Edward III replied, "Let his body rest in peace". The king later relented, and Mortimer's body was transferred to Wigmore Abbey, where Joan was later buried beside him. == Children ==