They now abandoned the secure cover to which they had been indebted for their temporary success, and were advancing up the ascent with all the confidence of a fancied superiority, when the Earl of UXBRIDGE, seizing upon the advantage presented for attacking them while moving up hill, with their Flanks unsupported, and a narrow Defile in their rear, and being also desirous of affording the 1st Life Guards an opportunity of charging, brought forward that Regiment through the 23rd Light Dragoons, who opened out for its passage to the front. The Life Guards now made their charge, most gallantly headed by Colonel Sir JOHN ELLEY, Deputy Adjutant General, who, at the moment of contact with the Enemy, began by cutting down two men right and left. It was truly a splendid charge; its rapid rush down into the Enemy's mass, was as terrific in appearance as it was destructive in its effect; for although the French met the attack with firmness, they were utterly unable to hold their ground a single moment, were overthrown with great slaughter, and literally ridden down in such a manner that the road was instantaneously covered with men and horses, scattered in all directions. The Life Guards, pursuing their victorious course, dashed into Genappe, and drove all before them as far as the opposite outlet of the town. This brilliant and eminently successful charge made a deep impression upon the Enemy, who now conducted his pursuit with extreme caution. The 23rd Light Dragoons, which had supported the 1st Life Guards in their charge, became again the last Regiment in the Rear Guard, and continued so during the remainder of the retreat. PONSONBY's Brigade had deployed to the right of the high road, and the guns were so disposed as to take advantageous positions, retiring _en échiquier_. The Enemy, after quitting Genappe, tried to get upon the Flanks of the Centre retiring Column, chiefly upon the Right Flank; but the Royals, Greys, and Inniskillings, manoeuvred beautifully; retiring by alternate Squadrons, and covered by their own Skirmishers, who completely beat the French Light Cavalry in that kind of warfare. Finding that from the deep state of the ground, there was not the least danger of his being turned by the Enemy, Lord UXBRIDGE gradually withdrew PONSONBY's Brigade to the high road. He kept the Light Cavalry, protected by the Household Brigade, as the Rear Guard, and slowly retired into the chosen position in front of Waterloo, the guns and rockets constantly plying the Enemy's Advance, which, although it pressed forward twice or thrice, and made preparations to attack, never ventured to come to close quarters with its opponents; and the Column received from it no further molestation.