What day did the son of Lady Margaret Beufort seize the English crown?
Henry VII of England Henry VII (Welsh: "Harri Tudur" ; 28 January 1457 – 21 April 1509) was King of England from seizing the crown on 22 August 1485 until his death on 21 April 1509, and the first monarch of the House of Tudor. He ruled the Principality of Wales until 29 November 1489 and was Lord of Ireland.
Humphrey, Duke of Gloucester Humphrey of Lancaster, 1st Duke of Gloucester, 1st Earl of Pembroke, KG (3 October 1390 – 23 February 1447) was an English nobleman. He was "son, brother and uncle of kings," being the fourth and youngest son of Henry IV and his first wife Mary de Bohun, the brother of Henry V, and the uncle of Henry VI.