ADAM's Brigade, consisting of the 52nd Regiment (under Colonel Sir JOHN COLBORNE), of the 71st Regiment (under Colonel REYNELL), of the 2nd Battalion of the 95th Regiment (under Lieutenant Colonel NORCOTT), and two Companies of the 3rd Battalion of the latter Corps (under Lieutenant Colonel Ross), was, previous to the commencement of the Battle, posted between the Village of Merbe Braine and the Nivelles road, near where the latter is intersected by the cross road leading to Braine l'Alleud: but as soon as the first attack was made upon Hougomont (with which the Battle opened), it was advanced beyond this cross road, and stood, in Battalion Columns of Companies, at quarter distance, on the plateau; whence it overlooked the Nivelles road, and had a full view of that portion of the main Front Line to which the troops of CLINTON's Division formed a Reserve. DU PLAT's Brigade of the King's German Legion, consisting of the 1st Line Battalion (under Major ROBERTSON), of the 2nd (under Major MÜLLER), of the 3rd (under Lieutenant Colonel WISSELL), and of the 4th (under Major REH), stood in Open Column, near the foot of the slope descending towards the Nivelles road. HALKETT's Brigade, consisting of the Landwehr Battalions Bremervörde (under Lieutenant Colonel VON DER SCHULENBURG), Salzgitter (under Major HAMMERSTEIN), Osnabrück (under Major Count MÜNSTER), and Quackenbrück (under Major VON DEM BUSSCHE HÜNEFELD), was posted in Contiguous Close Columns of Battalions, on the north side of the plateau, near the village of Merbe Braine. * * * * * The Second general Line of the Anglo-Allied Army consisted entirely of Cavalry, British and German. Posted partly on the reverse slope of the main ridge, and partly in the hollows in rear, it was entirely screened from the Enemy's observation. The Brigades were formed, for the most part, by Regiments, in Close Columns of Squadrons, at deploying intervals. Commencing from the right, near to the Nivelles road, stood the Fifth Brigade, under Major General Sir COLQUHOUN GRANT, consisting of the 7th and 15th Hussars, and of the 13th Light Dragoons (under Colonel DOHERTY.) On the left of GRANT's Brigade was posted the Third Brigade under Major General Sir WILLIAM DÖRNBERG, consisting of the 23rd Light Dragoons, and of the 1st and 2nd Light Dragoons of the King's German Legion. The Cumberland Hanoverian Hussars (under Lieutenant Colonel HAKE) were attached to, and formed in rear of, this Brigade. They properly belonged to Colonel ESTORFF's Hanoverian Cavalry Brigade: as did also the Prince Regent's Hussars (under Lieutenant Colonel FERDINAND Count KIELMANSEGGE), and the Bremen and Verden Hussars (under Colonel AUGUST VON DEM BUSSCHE); which Regiments were detached with the force at Hal. Still more to the left, and in rear of the Right of ALTEN's Division, stood the 3rd Hussars of the King's German Legion, under Colonel Sir FREDERICK VON ARENTSSCHILDT.