The Duke himself was in the prime of life, having just passed his forty-sixth birthday. He had never met Napoleon before, but he had often met and defeated his Marshals. His career had been one of almost uninterrupted success. His experience in the field against French soldiers had been large, and he was for this reason peculiarly fitted for the work he had now in hand. He had shown very varied ability. His military imagination, if one may use such a word, may not have been large, but he had few equals in the faculty of making up his mind what it was best to do under ascertained circumstances. His decisions were always dictated by practical reasons. He never allowed sentiment to hinder the exercise of his common sense. He could advance or retreat, fight or decline to fight, with equal ease,—with him it was a mere question of what it was best under the circumstances to do. Though esteemed a cautious officer, he had shown over and over again that he possessed not only courage and firmness, but that in daring, and in coolly taking great risks, he was equal to any emergency. His hold on his army, that is, on his own troops, was perfect. In ability, reputation, and in social rank, his preëminence among the officers of the British army and the King’s German Legion was cheerfully acknowledged, and over these parts of his army he exercised a perfect and unquestioned control. And his long experience in dealing with his Spanish allies had given him an uncommon facility in administering the affairs of such a composite body of troops as he was now to command. These three armies were curiously different in their internal economy. Napoleon, as we have said before, expected from his high officers a sort of coöperation. The “Correspondence of Napoleon” is full of long and confidential letters to his marshals, written during his campaigns, explaining the situation, stating his own intentions at length, giving them not only orders to be executed, but suggestions for their guidance in case of the happening of certain contingencies. We shall see excellent specimens of these letters in the course of this narrative. Napoleon had been for years constantly in the habit of directing complicated movements, in which the active and intelligent comprehension of his main object and purpose on the part of his lieutenants who were operating at a greater or less distance from him, was essential to success. Hence these elaborate communications, in which the style of the military order is but barely preserved, and in which the effort of the writer to impart all the information in his power to his correspondent and to give him an intelligent and precise knowledge of the objects of the campaign, is very evident.