Margaret and her husband were given 400 marks' worth of land by Buckingham, but her own estates were still their main source of income. For a time the Staffords were able to visit Margaret's son, who had been entrusted to Jasper Tudor's care at Pembroke Castle in Wales. Years of York forces fighting Lancastrian for power culminated in the Battle of Towton in 1461, where the Yorks were victorious. Edward IV was King of England. The fighting had taken the life of Margaret’s father-in-law and forced Jasper Tudor to flee to Scotland and France to muster support for the Lancastrian cause. Edward IV gave the lands belonging to Margaret’s son to his own brother, the Duke of Clarence. Henry became the ward of Sir William Herbert. Again, Beaufort was allowed some visits to her son. In 1469 the discontented Duke of Clarence and Earl of Warwick incited a rebellion against Edward IV, capturing him after a defeat of his forces. Beaufort utilized this opportunity to attempt to negotiate with Clarence, hoping to regain custody of her son and his holdings. Soon, however, Edward was back in power. Warwick’s continued insurrection resulted in the brief reinstallation of the Lancastrian Henry VI in 1470-71, which was effectively ended with York victory at the Battle of Barnet. Faced with York rule once again, Margaret allegedly begged Jasper Tudor - forced to flee abroad once more - to take thirteen-year-old Henry with him. It would be fourteen years before Beaufort saw her son again. In 1471, Margaret's husband, Lord Stafford, died of wounds suffered at the Battle of Barnet, fighting for the Yorkists. At 28 years old, Margaret became a widow again. In June 1472, Margaret married Thomas Stanley, the Lord High Constable and King of Mann. have suggested that Margaret never considered herself a member of the Stanley family. Their marriage was primarily one of convenience; marrying Stanley enabled Margaret to return to the court of Edward IV and Elizabeth Woodville. Indeed, Gristwood speculates Beaufort organized the marriage with the sole aim of rehabilitating her image and securing herself a prime position from which to advocate for her son. Evidently her efforts were successful; Margaret was chosen by Queen Elizabeth to be godmother to one of her daughters. Holinshed, a Tudor chronicler, claims King Edward IV later proposed a marriage between Beaufort’s son and his own daughter, Elizabeth of York, intending to force Henry Tudor out of his safe haven on the continent.