It was always easier in the Middle Ages to conquer a country than to keep it. And the experience of forty years might well have convinced Englishmen that no land was more difficult to hold than the stubborn and impenetrable northern kingdom, with its strenuous population, ever willing to cry a truce between local feuds when there was an opportunity of uniting against the southerners. Edward overshot his mark in grasping too eagerly the fairest portions of Balliol’s realm. He needed for his policy a Scottish king, strong enough to maintain himself against his subjects, and loyal enough to remain true to the English connexion. Any faint chance of Balliol occupying such a position was completely destroyed by his studied humiliation. Henceforward the King of Scots, who had fought so well at Dupplin and Halidon, was but a pawn in Edward’s game. Hated by the Scots as the betrayer of his country, distrusted by the English who henceforth spied his actions and commanded his armies in his name, the gallant victor of Dupplin lost faith in himself and in his cause. After all, he was his father’s son, and in no wise capable of bearing adversity and indignity with equanimity. His helplessness soon proved the worst obstacle in the way of the success of Edward’s plans. Even with the aid of a large Scottish party, Edward I. had failed to bring about the subjection of Scotland. It was clearly impossible for his grandson to succeed in the same task when all Scotland was united against him, and braced to action by a series of glorious memories.