GRANT, who, it will be recollected, had been detached with the 13th Light Dragoons and the 15th Hussars, to attack the 5th and 6th French Lancers, upon the extreme Left of the French Line, in consequence of certain menacing dispositions on their part, was first made aware that these had been merely a diversion to draw off a portion of the Allied Cavalry from the real point of attack, by the shouts which suddenly proceeded from their ranks; when, on turning round to ascertain the cause, he perceived the French in possession of the Batteries along the crest of the position, and charging the Squares posted on the interior slope. Observing a repetition of the attack, and the want of Cavalry on that part of the position which he had quitted; he most judiciously took upon himself to return to it with both Regiments: and, as will appear in the sequel, he arrived there at a most critical moment, when his absence might have produced the most fatal consequences. As a precautionary measure, the Right Squadron of the 15th Hussars, under Captain WODEHOUSE, was left in its original position, to observe the extreme Left of the French line; and the 2nd Light Dragoons of the King's German Legion continued to keep a look out between that point and Braine l'Alleud. NAPOLEON, perceiving the necessity of affording an immediate Support to NEY's attack, sent an Order to KELLERMANN to advance for that purpose, with his Corps of Heavy Cavalry, consisting of the two Divisions commanded by L'HERITIER and ROUSSEL D'URBAL, and comprising (at the commencement of the Battle) seven Squadrons of Dragoons, eleven Squadrons of _Cuirassiers_, and six Squadrons of Carabiniers. In the mean time, NEY, with a similar object in view, had ordered forward GUYOT's Heavy Cavalry Division of the Guard, comprising six Squadrons of Horse Grenadiers, and seven Squadrons of Dragoons. These thirty-seven Squadrons, combined with the force which had already attacked, and which had originally consisted of forty-three Squadrons, constituted a stupendous array of Cavalry, in comparison with that which was then posted in rear of the Right Wing of the Anglo-Allied Army; and which received no accession beyond the five Squadrons that GRANT was in the act of withdrawing, as before explained, from the extreme Right.