at Carmarthen: Dafydd ab Edmwnd wins the silver chair for his poetry. 1452 7 July - Eleanor, Duchess of Gloucester, exiled after her conviction for sorcery in 1442, dies at Beaumaris Castle. 23 November - King Henry VI of England acknowledges his half-brothers, Edmund and Jasper Tudor. Edmund becomes Earl of Richmond. Jasper becomes Earl of Pembroke. 1455 1 November - Edmund Tudor, 1st Earl of Richmond, marries Lady Margaret Beaufort. 1456 August - Edmund Tudor, 1st Earl of Richmond, is captured by the Yorkists and imprisoned at Carmarthen Castle, where he dies on 3 November of plague. 1457 28 January - Lady Margaret Beaufort, 13-year-old widow of Edmund Tudor, gives birth to Henry Tudor, later King Henry VII of England, at Pembroke Castle. Sir Walter Griffith purchases Burton Agnes Hall in Yorkshire. 1460 10 July - Following defeat at the Battle of Northampton on this date, Margaret of Anjou, queen of England, escapes with her son, Edward, Prince of Wales, to Harlech Castle. 23 July - John De la Bere resigns as Bishop of St David's after supporting the Tudors in the civil war. 1461 February - After losing the Battle of Mortimer's Cross, Jasper Tudor is placed under an attainder. William Herbert, Lord Herbert of Raglan, assumes the guardianship of Margaret Beaufort and her son Henry, Earl of Richmond. 1467 Sir William Stanley is appointed steward of the lordship of Bromfield and Yale. 1468 24 June - Richard Neville, 16th Earl of Warwick, grants a charter to Neath Abbey. 14 August - The garrison of Harlech Castle surrenders to King Edward IV after a seven-year siege. 1469 27 July - Following the Battle of Edgecote Moor, William Herbert, 1st Earl of Pembroke, and his brother Richard are executed. August - Richard Woodville, 1st Earl Rivers, and his son John Woodville are placed in prison in Chepstow. 1470 13 December - Edward of Westminster, Prince of Wales, marries (or is betrothed to) Anne Neville. 1471 4 May - Battle of Tewkesbury ends Lancastrian hopes of regaining the ascendance over the House of York. King Edward IV of England is victorious, and Edward of Westminster becomes the only Prince of Wales ever to die in battle. Sir John Donne is knighted on the field. 26 June - Prince Edward, son of King Edward IV, is invested as Prince of Wales. 13 October - Richard Redman is consecrated as Bishop of