Colonel Gordon’s patrol discovers the Prussians are retreating upon Wavre.—The allied army ordered to retire upon Waterloo.—The Duke writes to Blücher.—Retreat commenced, followed by the enemy.—Skirmishing.—Pressed by the lancers, who are charged by the 7th hussars; the latter are repulsed.—The life-guards make a successful charge.—Lord Anglesey’s letter, refuting a calumnious report of his regiment.—Allied army arrives on the Waterloo position.—The enemy arrive on the opposite heights, and salute us with round-shot, to which we reply to their cost.—Piquets thrown out on both sides.—Dismal bivac; a regular soaker.—The Duke and Napoleon’s quarters.—His Grace receives an answer from Blücher.—Probability of a quarrel on the morrow.—Orders sent to general Colville.—Description of the field of Waterloo; Hougoumont and La Haye-Sainte.—Disposition of the allied army, and the advantages of our position.—Disposition of the enemy, and admirable order of battle.—_The eve of Waterloo._—Morning of the 18th wet and uncomfortable; our occupation.—The Duke arrives; his appearance, dress, staff, etc.—Positions corrected.—French bands play, and their troops appear; are marshalled by Napoleon, a magnificent sight, worth ten years of peaceful life.—Why tarries Napoleon with his grand martial display?—The Emperor passes along his lines; his troops exhibit unbounded enthusiasm; his confidence of victory. Our bivac was quiet during the night, except that the arrival of cavalry and artillery caused an occasional movement. About two o’clock in the morning, a cavalry patrol got between the piquets, and a rattling fire of musketry began, which brought some of our generals to the spot; Picton was the first that arrived, when it was found that no attempt to advance had been made, and all was soon quiet again. After which the stillness of the enemy quite surprised his Grace, and drew the remark, “They are possibly retreating.” The Duke, who had slept at Genappe, was early at Quatre-Bras. Up to this time we had no satisfactory intelligence of the Prussians. His Grace consequently sent a patrol along the Namur road to gain intelligence; captain Grey’s troop of the 10th hussars was sent on this duty, accompanied by lieutenant-colonel the Hon. sir Alexander Gordon, one of the Duke’s aides-de-camp. Shortly afterwards, captain Wood, of the 10th, who had been patrolling, informed the Duke that the Prussians had retreated. Gordon’s patrol discovered, on the right of the road, some of the enemy’s vedettes and a piquet; they fell back hurriedly before the patrol, who turned off the high-road to their left, about five miles from Quatre-Bras, and about an hour afterwards came up with the Prussian rear. After obtaining the required information, the patrol returned to head-quarters at Quatre-Bras, where they arrived about seven o’clock A.M., reporting that the Prussians were retreating upon Wavre[16].