Pembroke Castle then reverted to Richard II. Short tenancies were then granted by The Crown for its ownership. By 1400 Owain Glyndŵr had begun a rebellion in Wales. However, Pembroke escaped attack because the castle's Constable, Francis а Court, paid off Glyndŵr in gold. Then in 1452, the castle and the earldom were presented to Jasper Tudor by his half-brother Henry VI. Tudor brought his widowed sister-in-law, Margaret Beaufort, to Pembroke where, in 1457, she gave birth to her only child, who was to become King Henry VII of England.