He therefore decided to retire upon Gembloux. During the night, he drew in all his outposts, and collected his somewhat scattered battalions. In the battle, battalions from one division had become mingled with battalions from another, and the Reserve Cavalry Division now consisted only of Lottum’s Brigade; Marwitz’s Brigade had retired with Zieten by Gentinnes. General Borcke, with the Ninth Division, and General Hobe with Lottum’s Cavalry Brigade, were left as rear-guard, drawn up along the Namur road, between Sombreffe and Point du Jour. At 2 A.M. the head of the Corps, consisting of the Reserve Artillery, moved off, and by 4 A.M., after sunrise, the rear-guard started. Two hours’ marching brought the main body to Gembloux. Here Thielemann, having found out that Bulow with the Fourth Corps had reached Baudeset, on the old Roman road, about 3 miles behind Gembloux, called a halt to rest his troops. It was a hazardous step, so far as he knew, for the French might be upon him at any moment; but it must be remembered that he had had no further instructions as to his future movements, beyond the bare fact that he was to join Bulow and together they were to unite with the main army. But where were the First and Second Corps? Thielemann sent word to Bulow to ask him if he had had any instructions as to their movements, and telling him that he had not yet been followed by the French. Bulow could give no information; but at 9.30 A.M., an aide-de-camp from Blucher arrived with orders for the Fourth Corps to march on Dion-le-Mont, a village 3 miles east of Wavre, _viâ_ Walhain and Corbaix. The orders further stated that Bulow was to post his rear-guard (the Fourteenth Division, under Ryssel--9 battalions, or 6,953 infantry) at Vieux Sart at the end of the march, so as to give notice of the approach of the French; and to send a force consisting of 1 cavalry regiment, 2 battalions of infantry, and 2 guns of horse artillery, to Mont St Guibert, to support Colonel Sohr, who was at Tilly with a cavalry brigade and 4 guns acting as rear-guard to the First and Second Corps. When Sohr fell back, the detachment from Bulow’s Corps was to remain at Mont St Guibert as rear-guard on the Tilly road. Bulow therefore detached Colonel Ledebur with the 10th Hussars, the Fusilier battalions of the 11th regiment of the line and the 1st Pomeranian Landwehr, and 2 guns of No. 12 Battery Horse Artillery, to Mont St Guibert, while the remainder of his Corps marched upon Dion-le-Mont. The movement was painfully slow, and not until 10.30 P.M. were the troops in position.