then retires. August - Owain Glyndŵr holds his second parliament, at Harlech Castle. 1406 31 March - Owain Glyndŵr writes the "Pennal letter" to the King of France, outlining his policy for the future government of Wales and support for the Avignon Papacy. 1407 June - Henry, Prince of Wales, lays siege to Aberystwyth Castle. 4 October - The Pope appoints Henry Chichele Bishop of St David's. 1408 Adam of Usk returns to Wales from continental exile, seeking the patronage of Owain Glyndŵr. 1409 Harlech Castle is captured by Henry of Monmouth. Margaret Hanmer (Glyndŵr's wife), her children and grandchildren are taken prisoner. As far as is known, most of them later die in captivity. 1410 Sir John Scudamore marries Alys, daughter of Owain Glyndŵr. 1411 Sir William Gamage succeeds to the Coity estates on the death of Sir Laurence Berkerolles, and lays siege to Coity Castle. 1412 June - The seneschal and the receiver of Brecon negotiate to ransom Dafydd Gam from his captivity in the hands of Owain Glyndŵr. 1415 21 September - Owain Glyndŵr goes into hiding. His subsequent whereabouts and date of death are unknown. End of the Glyndŵr Rising. 25 October - Battle of Agincourt. Welsh archers are key to Henry V's victory over a much larger French army. 1417 30 April - Maredudd ab Owain Glyndŵr declines the offer of a pardon from King Henry V of England. 1418 Gruffydd Young, Owain's former Chancellor, is appointed Bishop of Ross. 1419 24 April - Philip Morgan is elected Bishop of Worcester. 1420 16 October - In the new parliament, Roger Corbet and David Rathbone become MPs for the borough of Shrewsbury, while Roger's brother Robert represents Shropshire. 4 March - Settlement made at Shrewsbury between Edward Cherleton, Lord of Powys, and Sir Gruffudd Vaughan, his brother Ieuan ap Gruffydd, and two yeomen for the capture of Sir John Oldcastle in 1417. 1421 Maredudd ab Owain Glyndŵr accepts a pardon from King Henry V of England. 1425 Iron forge at Pontypool operating by about this date. 1426 William ap Thomas, ancestor of the Herbert Earls of Pembroke, is knighted. 1435 Work begins on the construction of Raglan Castle (approximate). 1437 January - Owen Tudor is imprisoned at Newgate Prison following the death of his wife, Catherine of Valois. 1450 April - William Herbert, 1st Earl of Pembroke, is taken prisoner at the Battle of Formigny. Eisteddfod