UXBRIDGE immediately made the following dispositions for this purpose. The First or Household Brigade of Heavy Cavalry commanded by Major General Lord EDWARD SOMERSET, and consisting of the 1st Life Guards (under Lieutenant Colonel FERRIOR), of the 2nd Life Guards (under Lieutenant Colonel the Hon. EDWARD P. LYGON), of the Royal Horse Guards, or Blues (under Lieutenant Colonel Sir ROBERT CHAMBRE HILL), and of the 1st (or King's) Dragoon Guards (under Colonel FULLER), together with the Second Brigade of Heavy Cavalry, commanded by Major General the Honourable Sir WILLIAM PONSONBY, consisting of the 1st, or Royal Dragoons (under Lieutenant Colonel CLIFTON), of the 2nd Royal North British Dragoons, or Scots Greys (under Colonel HAMILTON), and of the 6th, or Inniskilling Dragoons (under Colonel MUTER), formed the Centre Column, which was to retire by the Brussels high road. VANDELEUR's and VIVIAN's Brigades constituted the Left Column, which was to effect its retreat by a Bridge over the Genappe at Thuy, still lower down the stream than that by which ALTEN's Infantry Division had crossed. The Right Column was formed of part of the Third Light Cavalry Brigade, commanded by Major General Sir WILLIAM DÖRNBERG, the 1st and 2nd Light Dragoons of the King's German Legion (under Lieutenant Colonels BÜLOW and DE JONQUIÈRES), while the remaining Regiment, which was the 23rd British Light Dragoons (under Colonel the Earl of PORTARLINGTON), was employed as a portion of the Rear Guard of the Centre Column. The 15th British Hussars (under Lieutenant Colonel DALRYMPLE), belonging to the Fifth Cavalry Brigade, under Major General Sir COLQUHOUN GRANT, was also attached to the Right Column; while of the two remaining Regiments of the Brigade, the 2nd Hussars of the King's German Legion (under Lieutenant Colonel LINSINGEN), and the 7th British Hussars (under Colonel Sir EDWARD KERRISON), the former had been left in occupation of a line of Posts on the French frontier, extending from Courtrai, through Menin, Ypres, Loo, and Fürnes, to the North Sea, and the latter formed a part of the Rear Guard of the Centre Column. This Right Column was to pass the Genappe by a ford higher up the stream than the town of Genappe.