Previously to this, that is, between nine and ten o'clock in the evening, Captain CRASSIER's Company of the 27th Battalion of _Chasseurs_ moved out from Nivelles towards Quatre Bras _en reconnaissance_. About two o'clock in the morning, PERPONCHER himself followed with the remainder of the _Chasseurs_, which body reached Quatre Bras at four o'clock. General BYLANDT, who commanded the First Brigade, ordered the remaining Battalions of the latter, and his Artillery, to commence their march from Nivelles at five o'clock. The 7th Dutch Line Battalion was directed to remain at Nivelles until relieved by ALTEN's Division. At three o'clock in the morning, PERPONCHER arrived at Quatre Bras, and after having reconnoitred the position, immediately commenced operations for recovering the ground lost on the previous evening. Just at this time a detachment of about fifty Prussian Hussars of the 2nd Silesian Regiment, under Lieutenant ZEHELIN, who, on the previous day, had been driven back from near Gosselies, and had retreated towards Hautain le Val, gallantly advanced to the front, attacked the Enemy's Outposts, forced them to retire, and then formed a chain of Vedettes. As soon as the Dutch-Belgian troops had advanced to within a short distance of these Prussian Hussars, the latter moved off by their left towards Sombref. Prince BERNHARD of Saxe Weimar's Brigade penetrated deeper into the Wood of Bossu, and secured the entrances into it from the French side. PERPONCHER directed the 2nd Battalion of the 2nd Regiment of Nassau to take post on an eminence in advance towards Frasne, and stationed the 3rd Battalion of this Regiment more to the left. The latter, however, was soon relieved by the 27th Chasseurs, which Battalion, on reaching Quatre Bras, at four o'clock in the morning, had detached two Companies to the left. These moved steadily forward in extended order towards the Wood of Delhutte, outside of which the Enemy showed his Light Troops. They succeeded in forcing back the French into a hollow way bordering the Wood, where the latter maintained themselves for some little time, and then retired into the Wood itself. Taking advantage of the cover afforded by the edge of the Wood, the French now poured a deadly fire upon their assailants, who retreated to some favourable ground a little in advance of their Battalion. The Prince of ORANGE arrived at Quatre Bras about six o'clock, and immediately reconnoitred the position of the Enemy, and that occupied by his own troops. Having expressed his perfect satisfaction with all the arrangements and dispositions which had been made, both on the previous evening and on that morning, he ordered the troops then present to take up a position more in advance, for the purpose of imposing upon the Enemy; enjoining at the same time, all unnecessary firing, it being desirable under then existing circumstances, to avoid bringing on prematurely an attack by the Enemy. * * * * *