The Detachments left by the Third Brigade at Farciennes and Tamines, had been previously called in, and effected their retreat without any molestation, as did also, subsequently, the Second Brigade from Lambusart, by Boulet, towards Fleurus, protected by the Reserve Cavalry. ZIETEN's Corps, at three o'clock in the morning had possessed a line of Advanced Posts, from Dinant on the Meuse, crossing the Sambre at Thuin, and extending as far as Bonne Esperance, in advance of Binche; thus stretching along a space of from forty to fifty miles in length: its main force occupied the Sambre from Thuin as far as its confluence with the Meuse, an extent of, at least, thirty six miles, exclusive of the numerous windings throughout the whole course of the river between those two points. The men had, since daybreak, been constantly under arms, in motion, and almost as constantly engaged, pursued, and assailed upon all points by an overwhelming superiority of force, headed by the _élite_ of the French Cavalry; and it was not until about eleven o'clock at night that the Corps effected its concentration in position between Ligny and St Amand, at a distance varying from fourteen to twenty miles in rear of its original extended line of Outposts; after having successfully and gloriously fulfilled the arduous task imposed upon it of gaining sufficient time for the concentration, on the following day, of all the Prussian Corps, by stemming, as well as its scattered force would admit, the imposing advance of the whole French Army. The loss of the First Prussian _Corps d'Armée_ on the 15th of June, amounted to 1200 men. The Fusilier Battalions of the 28th Regiment and of the 2nd Westphalian Landwehr, reduced to mere skeletons, were united, and formed into one Battalion. Before ten o'clock on the morning of the 15th, a further Order was despatched from the Prussian Head Quarters to the Third _Corps d'Armée_, to the effect that after resting during the night at Namur, it was to continue its march upon the morning of the 16th, towards Sombref. At half past eleven o'clock in the forenoon a despatch was forwarded to BÜLOW, announcing the advance of the French, and requesting that the Corps after having rested at Hannut, should commence its march upon Gembloux by daybreak of the 16th, at the latest. By three o'clock in the afternoon of the 15th, the Second _Corps d'Armée_ had taken up the position assigned to it between Onoz and Mazy in the immediate vicinity of Sombref, with the exception, however, of the Seventh Brigade, which, having been stationed in the most remote of the Quarters occupied by the Corps, did not reach Namur until midnight. Here the latter found an Order for its continuance in Namur until the arrival of the Third _Corps d'Armée_; but as this had already taken place, the Brigade, after a few hours' rest, resumed its march, and joined its Corps at Sombref about ten o'clock in the morning of the 16th June.