On arriving at the foot of the Anglo-Allied position, the 23rd Light Dragoons moved off to the (Allied) right of the high road, and into the hollow in which lies the Orchard of the Farm of La Haye Sainte. Here they were drawn up, prepared to meet the French Advanced Guard, should it follow them, or to fall upon its Flank, should it venture to continue its march along the road. The latter, however, halted upon the Height which intervenes between La Haye Sainte and La Belle Alliance, and opened a fire upon the Centre of the Duke of WELLINGTON's Line, above the former Farm, from two Batteries of Horse Artillery. PICTON, who was then upon the rising ground in rear of La Haye Sainte, and who was intently watching the Enemy's advance along the high road, perceived Columns of Infantry advancing from La Belle Alliance. He immediately took upon himself to unite the two Batteries nearest at hand, which were those under Major LLOYD of the British Artillery, and Major CLEEVES of the King's German Legion (although not belonging to his own Division), and to place them in position on the high ground close to the Charleroi road. The guns immediately opened a brisk cannonade upon the French Columns, of which they had obtained a most accurate range just as their leading Divisions had entered the inclosed space between the high banks which line the high road where it is cut through the Height before mentioned as intervening between La Belle Alliance and La Haye Sainte. This mass of the Enemy's Infantry suffered severely from the fire, to which it stood exposed about half an hour: for the head of the Column having been unable to retrograde, in consequence of the pressure from its rear, and prevented by the high bank on either side of the road from filing off to a flank, could not readily extricate itself from so embarrassing a situation. During the whole of this fire, the Allied Batteries were replied to, though very ineffectually, by the two Batteries of French Horse Artillery posted on the Height in question. It was now twilight: the approaching darkness was greatly accelerated by the lowering aspect of the sky. Picquets were hastily thrown forward by both Armies, and to so great a height had the mutual spirit of defiance arisen, that the near approach of opposing parties, advancing to take up their ground for the night, led to little Cavalry affairs, which, though unproductive of any useful result to either side, were distinguished, on different points of the Lines, by a chivalrous bravery which seemed to require a prudent restraint.