That consummation could not be far off. Charles had scarcely turned his back upon Spain when murmurs of disaffection were heard through the length and breadth of the land; and while he was discussing with Henry at Calais the prospects of a war with France, his commons in Spain broke out into open revolt.[400] The rising had attained (p. 144) such dimensions by February, 1521, that Henry thought Charles was likely to lose his Spanish dominions. The temptation was too great for France to resist; and in the early spring of 1521 French forces overran Navarre, and restored to his kingdom the exile D'Albret. Francis had many plausible excuses, and sought to prove that he was not really the aggressor. There had been confused fighting between the imperialist Nassau and Francis's allies, the Duke of Guelders and Robert de la Marck, which the imperialists may have begun. But Francis revealed his true motive, when he told Fitzwilliam that he had many grievances against Charles and could not afford to neglect this opportunity for taking his revenge.[401] [Footnote 400: _Ibid._, iii., 883, 891, 964, 976, 988, 994.] [Footnote 401: _L. and P._, iii., 1303, 1310, 1315.] * * * * * War between Emperor and King soon spread from Navarre to the borders of Flanders and to the plains of Northern Italy. Both sovereigns claimed the assistance of England in virtue of the Treaty of London. But Henry would not be prepared for war till the following year at least; and he proposed that Wolsey should go to Calais to mediate between the two parties and decide which had been the aggressor. Charles, either because he was unprepared or was sure of Wolsey's support, readily agreed; but Francis was more reluctant, and only the knowledge that, if he refused, Henry would at once side with Charles, induced him to consent to the conference. So on 2nd August, 1521, the Cardinal again crossed the Channel.[402] His first interview was with the imperial envoys.[403] They announced that Charles had given them no power to treat for a truce. Wolsey refused to proceed without this authority; and he obtained the consent of the French chancellor, (p. 145) Du Prat, to his proposal to visit the Emperor at Bruges, and secure the requisite powers. He was absent more than a fortnight, and not long after his return fell ill. This served to pass time in September, and the extravagant demands of both parties still further prolonged the proceedings. Wolsey was constrained to tell them the story of a courtier who asked his King for the grant of a forest; when his relatives denounced his presumption, he replied that he only wanted in reality eight or nine trees.[404] The French and imperial chancellors not merely demanded their respective forests, but made the reduction of each single tree a matter of lengthy dispute; and as soon as a