On the 1st of September Wellington marched out of Madrid, and directed his course towards Valladolid, leaving, however, Hill in the city with two divisions. He then proceeded towards Burgos, and, on the way, fell in with the Spanish army of Galicia, commanded by Santocildes, ten thousand in number, but, like all the Spanish troops, destitute of discipline and everything else which constitutes effective soldiers--clothes, food, and proper arms. Clausel quitted Burgos on the approach of Wellington, but left two thousand, under General Dubreton, in the castle. Wellington entered the place on the 19th, and immediately invested the castle. The French stood a desperate siege vigorously, and after various attempts to storm the fort, and only gaining the outworks, the news of the advance of the army of the north, and of that of Soult and King Joseph from the south, compelled the British to abandon the attempt. General Ballasteros had been commanded by the Cortes, at the request of Lord Wellington, to take up a position in La Mancha, which would check the progress of Soult; but that proud and ignorant man neglected to do so, because he was boiling over with anger at the Cortes having appointed Lord Wellington Commander-in-Chief of the Spanish armies. General Hill, therefore, found it prudent to quit Madrid, and fall back on Salamanca; and Lord Wellington, on the 21st of October, raised the siege of the castle of Burgos, and moved to Palencia, to be near to General Hill. At Palencia Lord Dalhousie joined him with a fresh brigade from England; and he continued his retreat to the Douro, pursued briskly by the French, under General Souham. At Tudela Souham halted to wait for Soult, who was approaching. Wellington did not feel himself secure till he had crossed the Tormes. On his march General Hill came up, and once more taking up his old position on the heights of San Christoval, in front of Salamanca, which he did on the 9th of November, he declared, in his dispatch to the Secretary at War, that he thought he had escaped from the worst military situation that he ever was in, for he could not count at all on the Spanish portion of his army. On the 10th Souham and Soult united their forces, now amounting to seventy-five thousand foot and twelve thousand cavalry; Wellington's army mustering only forty-five thousand foot and five thousand cavalry. He now expected an immediate attack, and posted his army on the heights of the two Arapiles for the purpose; but the French generals did not think well to fight him, and he continued his retreat through Salamanca, and on to Ciudad Rodrigo, where he established his headquarters, distributing part of his army in their old cantonments between the Agueda and the Coa. This was accomplished before the end of November; and General Hill proceeded into Spanish Estremadura, and entered into cantonments near Coria. The French took up their quarters at some distance in Old Castile.