He ordered the Batteries of the First _Corps d'Armée_ (ZIETEN's) to be suitably posted for impeding the Enemy's advance. The three Heavy Batteries of the Corps were immediately drawn up on the Height between Ligny and St Amand. They were supported by the Battery of the First Brigade, posted in rear of St Amand. Somewhat later, when the direction of attack by GÉRARD's Corps became more developed, the Battery of the Third Brigade was placed on the right of Ligny, near a quarry, and the Battery of the Fourth Brigade on the left of the Village, upon the declivity descending to the rivulet. The Battery of the Second Brigade, the Foot Battery No. 1, and the Horse Battery No. 10, remained in reserve. Of the remaining Horse Batteries of the Corps, one continued with the Cavalry under General RÖDER (which was posted in a hollow, as before stated, between Ligny and Sombref), and the other was with the 1st Silesian Hussars, which Regiment had been detached in observation on the Right Flank of the Army, and posted between the northern extremity of the village of Wagnelé and a large pond contiguous to the old Roman road. By the time the action commenced in front of St Amand and Ligny--half past two o'clock--BLÜCHER was satisfied that no necessity existed for any movement of his Third _Corps d'Armée_ to the right; and he therefore ordered it to proceed from the position it had hitherto held in Columns upon the two high roads near Sombref, and form the Left Wing of his line of battle; resting its Right upon Sombref, and occupying the Heights, at the foot and on the declivities of which are situated the Villages of Mont Potriaux, Tongrines, Tongrenelle, Boignée, Balatre, Vilrets, and Botey.