Pampeluna and San Sebastian being invested, Lord Wellington proceeded with his main army to occupy the passes of the Pyrenees. These, Wellington, in his dispatches, says amounted to about seventy, and, in the service of securing these, he complains that he was left very much without the necessary supplies for his army. The British Government had, from some cause--he supposed to send them against the Americans--reduced the number of convoys, and many of our store-ships were taken by the French frigates and privateers. It was, as much as ever, in vain to expect the Spaniards to do anything to supply the deficiency, after all that the English had done for them. As fast as they got rid of the French, they busied themselves in making war on the clergy and putting them down. Wellington was, therefore, continually obliged to arrest his marches to wait for provisions. Notwithstanding, by the 7th of July he had driven Joseph Buonaparte through the mountains into France, chased Clausel beyond Tudela on the Ebro, and taken his post on the very edge of France. Buonaparte, alarmed at the progress of Wellington, displaced Jourdan as incapable, and sent back Soult to do what neither he, nor Ney, nor Marmont, nor Massena had been able to do before they were necessarily displaced--that is, arrest the onward march of Wellington into France. Soult hurried southward, collecting fresh forces to repel the conquering invader, and issued a proclamation, telling the French soldiers that they had at length taught the English to fight, and they must show them that they were still their superiors. Whilst Wellington was superintending the sieges of San Sebastian and Pampeluna, Soult advanced, having gathered an army of nearly seventy thousand men, and, on the 25th of July, he suddenly attacked our outposts simultaneously in the passes of Roncesvalles and of Maya. Both these passes converged into one leading to Pampeluna, where Soult hoped to raise the siege. He himself led on thirty thousand fresh men up the Roncesvalles pass against Generals Cole and Picton, who had about ten thousand to oppose him. He compelled them to retreat to some greater elevations, but with considerable loss, and he hoped there to have them joined by General D'Erlon, who had ascended the Maya pass, with thirteen thousand men, against General Stewart, who had only four or five thousand men to oppose him. The conflict there had been terrible; the British fighting and giving way only step by step against the superior force. The awful struggle went on, five thousand feet above the plains of France, amid clouds and fogs. Stewart did not fall back till he had sixteen hundred of his small force killed and wounded, and the defiles were actually blocked up with the slain.