The battalion passed the following night on the field. The Prussians had been attacked on the 16th of June at Ligny, and forced to retreat to Wavre; a corresponding movement was made by the Duke of Wellington, to keep up the communication with the Prussians, and the ROYAL SCOTS, retreated on the 17th of June, with the remainder of the army, to the elevated grounds in front of the village of _Waterloo_, where the troops passed a stormy night in the open fields, drenched with rain. On the memorable 18th of June the battalion formed part of the reserve under the gallant Sir Thomas Picton. At the commencement of the battle, when the enemy sent forward a cloud of skirmishers, and developed his massy columns of attack, the ROYAL SCOTS, commanded by Major Colin Campbell, were instantly engaged with the legions of Napoleon. "I have great pleasure," observes an officer, who was an eye-witness, "in detailing the conduct of the gallant 3rd battalion of the ROYAL SCOTS, and though I have been present with the battalion at the battles of Busaco, Fuentes d'Onor, Salamanca, Vittoria, both stormings of St. Sebastian, the passage of the Bidassoa, &c., &c., in all which they bore a most conspicuous part, and suffered severely, I can assure you they never evinced more steadiness, or more determined bravery, than at the late battle. "About nine o'clock on the morning of the 18th June, the battalion was attacked by the enemy, and, with very little interruption, the entire day it formed a line of skirmishers in front of the brigade. "I have often seen the battalion engaged, but, I must confess, on this trying day, it far excelled anything I had ever witnessed; and indeed, so pleased was the late General Picton with its gallantry and good conduct, that he several times expressed it himself to the battalion in the most flattering terms."