Ross described the Clifford estates—centred on Cumberland, Westmorland, Durham and Yorkshire—as "valuable and strategically important in the troubled north". The 9th Baron had never, though, been as wealthy as some of the neighbouring families, such as the Darcys. His 1461 attainder prevented his son from inheriting, but in 1470 King Edward was forced from the throne and into exile, and HenryVI was returned to the throne. The Earl of Warwick—now aligned with the House of Lancaster against Edward—was in charge of the government, and his brother, John, Marquess Montagu, was granted the Henry Clifford's wardship during his minority. Summerson posits that this was a chance for Clifford to regain his inheritance. There was probably insufficient time to press his claim, however, as both Nevilles were killed at the Battle of Barnet on 14 April the following year. EdwardIV's victory at Barnet, and at the Battle of Tewkesbury a few weeks later, destroyed the remnants of Lancastrian resistance and returned Edward to the throne. Despite Clifford's Lancastrian connections, he seems never to have been in any danger at this time, as on 16 March 1472 Edward granted him a royal pardon. This was despite an attempt by Clifford's brother Thomas to raise an—albeit unsuccessful—pro-Lancastrian rebellion in Hartlepool. Henry Clifford was duly allowed to inherit the estates of his maternal grandfather, Henry Bromflete, Lord Vescy—who had died in 1469—but not yet his Clifford patrimony. Further, as his mother was still alive, a third of his inheritance—her dower—remained out of his control until her death in 1493.