In June 1405, King Henry IV stopped at a small Yorkshire manor house to shelter from a storm. That night he awoke screaming that traitors were burning his skin. His instinctive belief that he was being poisoned was understandable: he had already survived at least eight plots to dethrone or kill him in the first six years of his reign. Henry IV had not always been so unpopular. In his youth he had been a great chivalric champion and crusader. The son of John of Gaunt, he was courteous, confident, well-educated, generous, devoted to his family, musical and spiritually fervent. In 1399, at the age of thirty-two, he was enthusiastically greeted as the saviour of the realm when he ousted from power the insecure and tyrannical King Richard II. But therein lay Henry’s weakness. In making himself king he had broken God's law and left himself starkly open to criticism.