PAJOL had not proceeded very far when he perceived a Prussian Battery retiring upon Namur, which he lost no time in capturing and forwarding to Head Quarters; where the circumstance strengthened the belief that BLÜCHER had retreated by that road. It was the Prussian Horse Battery No. 14, belonging to the Second Corps, which, having towards the end of the Battle expended every shot, had driven off the Field to procure a fresh supply of ammunition, but had not succeeded in falling in with the Reserve Ammunition Waggons. The Battery neither returned to its own Corps, nor did it comply with THIELEMANN's express Order to march upon Gembloux, but consumed much time in uselessly driving first in one direction, and then in another. It was accompanied at this moment by a Squadron of the 7th Prussian Uhlans, which the Third Corps had neglected to recall from Onoz. The Squadron retired on the approach of the French Cavalry, and escaped with a loss of 30 men; but all the guns fell into the hands of the Enemy. PAJOL, feeling at last some reason to doubt that Namur was a point in the Prussian retreat, diverged from the high road, and proceeded to St Denis, where he was joined by TESTE's Division. A Brigade of EXCELMANS' Cavalry Corps had been detached to offer support to PAJOL, should the latter require it; but in consequence of certain information, gained upon the road, it was subsequently directed to proceed towards Gembloux, on approaching which it discovered traces of the Prussian retreat. GROUCHY, who commanded the Right Wing of the French Army in NAPOLEON's absence, repaired early in the morning to the Emperor's Quarters at Fleurus, for instructions, according to an Order he had received to that effect on the previous evening. He was desired to wait and accompany the Emperor, who was going to visit the Field of Battle. The latter, however, did not start from Fleurus until between eight and nine o'clock, and on reaching St Amand, he examined the approaches by which this Village had been attacked the day before; then, he rode about the Field, gave directions for the care of the wounded; and, as he passed in front of different Regiments, that were falling in without arms on the ground where they were bivouacked, he was received with loud cheers. He addressed himself to nearly all the Corps, and assured them of the lively satisfaction he had felt on witnessing their conduct in the battle. Having dismounted, he conversed freely, and at great length, with GROUCHY and GÉRARD, on the state of public opinion in Paris, the different political parties, and on various other subjects quite unconnected with those military operations upon the successful issue of which depended the stability of his present power.