King Henry IV of England. Soon afterwards, on 4 April 1406 King Robert III died, leaving Scotland without a King. Prince James, now the heir to the throne of Scotland and just 12 years old, would endure 18 years of detention in England. In his absence the Albany Stewarts took the reins of power, and Murdoch's father, Robert Stewart, Duke of Albany, became Governor of Scotland, king in all but name. The English price of returning James to Scotland was English overlordship of Scotland, something that few Scots were prepared to accept. At this time Murdoch Stewart was still a prisoner in England, but in 1416 he was exchanged for Henry Percy, 2nd Earl of Northumberland, and he returned to Scotland. The Albany Stewarts took James's lands under their own control, depriving the king of income and any of the regalia of his position. James was referred to in the official records as merely 'the son of the late king'. Governor of Scotland and Duke of Albany In 1420, on his father's death, Murdoch, now aged 58, finally inherited the Dukedom of Albany. He also inherited the Earldom of Fife and the Earldom of Menteith, and at last became Governor of Scotland in his own right. He would hold this position from 1420 to 1424, while King James I was still held captive in England. Few serious attempts appear to have been made by Duke Albany to return James to Scotland, but eventually political pressure compelled Murdoch to agree to a general council. Ransom and return of James I In August 1423 it was agreed that an embassy should be sent to England to negotiate James's release. A ransom treaty of 60,000 marks (an enormous sum) was agreed at Durham on 28 March 1424, to which James attached his own seal—he and his queen, accompanied by an escort of English and Scottish nobles, proceeded to Melrose Abbey, arriving on 5 April where he met Albany to receive the governor's seal of office. Upon the return of James I to Scotland, Albany lost his position as Regent. James began to consolidate his position. His coronation took place at Scone on 21 May 1424. At his coronation parliament the king—probably with the intent of securing a cohesive political community loyal to the crown—knighted 18 prominent nobles including Albany's son Alexander Stewart. At this stage, it is probable that the king felt unable