At the same time he dealt an equal measure of rebuff to France. Before the conference at Guisnes Francis had done some work towards rebuilding the ruined walls of Ardres on the French frontier. After the conference the work was continued till England resented it as an unfriendly act. Francis was obliged to give way, and order the building to be stopped. Neither Francis nor Charles were allowed to presume on the complacency of England, nor use their alliance with her to further their own purposes. The general aspect of affairs was so dubious that it was necessary for England to be prepared for any emergency, and first of all Scotland must be secured as far as possible. Since the fall of James IV. at Flodden Field, Scotland had been internally unquiet. Queen Margaret gave birth to a son a few months after her husband's death, and, to secure her position, took the unwise step of marrying the Earl of Angus. The enemies of Angus and the national party in Scotland joined together to demand that the Regency should be placed in firmer hands, and they summoned from France the Duke of Albany, a son of the second son of James III., who had been born in exile, and was French in all the traditions of his education. When Albany came to Scotland as Regent, Queen Margaret and Angus were so assailed that Margaret had to flee to England for refuge in 1515, leaving her son in Albany's care. She stayed in England till the middle of 1517, when she was allowed to return to Scotland on condition that she took no part in public affairs. About the same time Albany returned to France, somewhat weary of his Scottish charge. By his alliance with Francis Henry contrived that Albany should not return to Scotland; but he could not contrive to give his sister Margaret the political wisdom which was needed to draw England and Scotland nearer together. Margaret quarrelled with her husband Angus, and only added another element of discord to those which previously existed. The safest way for England to keep Scotland helpless was to encourage forays on the Border. The Warden of the Western Marches, Lord Dacre of Naworth, was admirably adapted to work with Wolsey for this purpose. Without breaking the formal peace which existed between the two nations, he developed a savage and systematic warfare, waged in the shape of Border raids, which was purposely meant to devastate the Scottish frontier, so as to prevent a serious invasion from the Scottish side. Still Henry VIII. was most desirous to keep Scotland separate from France; but the truce with Scotland expired in November 1520. Wolsey would gladly have turned the truce into a perpetual peace; but Scotland still clung to its French alliance, and all that Wolsey could achieve was a prolongation of the truce till 1522. He did so, however, with the air of one who would have preferred war; and Francis I. was induced to urge the Scots to sue for peace, and accept as a favour what England was only too glad to grant.