Two years of useless opposition disgusted the Duke with this nominal Protectorship, and in 1424 he left the realm to push his fortunes in the Netherlands. Jacqueline, the daughter and heiress of William, Count of Holland and Hainault, had originally wedded John, Duke of Brabant; but after a few years of strife she had procured a divorce from one of the three claimants who now disputed the Papacy, and at the close of Henry the Fifth's reign she had sought shelter in England. At his brother's death the Duke of Gloucester avowed his marriage with her and adopted her claims as his own. To support them in arms however was to alienate Philip of Burgundy, who was already looking forward to the inheritance of his childless nephew, the Duke of Brabant; and as the alliance with Burgundy was the main strength of the English cause in France, neither Bedford, who had shown his sense of its value by a marriage with the Duke's sister, nor the English council were likely to support measures which would imperil or weaken it. Such considerations however had little weight with Humphrey; and in October 1424 he set sail for Calais without their knowledge with a body of five thousand men. In a few months he succeeded in restoring Hainault to Jacqueline, and Philip at once grew lukewarm in his adherence to the English cause. Though Bedford's efforts prevented any final break, the Duke withdrew his forces from France to aid John of Brabant in the recovery of Hainault and Holland. Gloucester challenged Philip to decide their claims by single combat. But the enterprise was abandoned as hastily as it had been begun. The Duke of Gloucester was already disgusted with Jacqueline and enamoured of a lady in her suite, Eleanor, the daughter of Lord Cobham; and in the summer of 1425 he suddenly returned with her to England and left his wife to defend herself as she might. [Sidenote: Henry Beaufort]