GUYOT's Division of the Guard having been placed by NAPOLEON at NEY's disposal, when he first desired him to form the grand Cavalry attack, the Marshal was entitled to employ it if he thought proper; but it is doubtful whether NAPOLEON, after having sent forward KELLERMANN's Corps, was desirous that the combined force should be thus prematurely engaged, since it would deprive him of his only Cavalry Reserve. Still, when we consider the limited extent of the Field of Battle, and the consequent facility with which he might have either suspended the employment of the Heavy Cavalry of the Guard, or countermanded KELLERMANN's advance, it is reasonable to infer that the French Emperor was not altogether displeased with the grand experiment which was about to be made, and which encouraged the most sanguine expectations of a glorious triumph. The coming attack was, like the former one, preceded by a violent cannonade. As before, the French Batteries concentrated their fire upon the Allied Artillery and Squares. The entire space immediately in rear of the crest of the ridge that marked the Front Line of the Duke's Right Wing, was again assailed with a tempest of shot and shell. Again were whole Files torn away, and compact Sections rent asunder. But the extraordinary skill and the untiring energies of the British and German Gunners, combined with the heroic forbearance and the admirable steadiness of the Squares, fully impressed upon the mind of WELLINGTON the conviction that, however formidable and disproportionate the force that his powerful adversary could wield against him, it might yet be made to suffer an exhaustion, moral as well as physical, that would render it totally unavailable and helpless at the moment when its extremest tension and fullest application would be so urgently required to extricate the Emperor from that perilous crisis which, by his Grace's masterly arrangements, was gradually approaching its consummation. To act exclusively on the defensive, to maintain his ground in defiance of every assault and every stratagem; and yet to harass and weaken his Enemy to the extent of his power, constituted the grand point on which hinged the practical development of those arrangements. A defeat and dispersion of his Army before the arrival of the Prussian troops, would lead to new measures, to additional sacrifices--perhaps to irretrievable disasters. But his resolve was fixed and irrevocable; for he knew that he could fearlessly rely upon the devotion, the endurance, and the valour of his British and German soldiers. And this implicit confidence was nobly reciprocated; for as the troops remarked the serenity of his countenance and demeanour when rectifying any confusion or disorder, or felt as if spellbound by the magic influence of a few simple and homely words from his lips, they entertained no doubts as to the result of their glorious exertions.