Reynier’s feints meanwhile had given Hill some trouble; the appearance of a northward move on the part of his adversary had caused the British general to make ready for a parallel march on Fundão and Guarda, so as to connect himself with his chief. He transferred his head quarters first from Castello Branco to Sarzedas, and then from Sarzedas to Atalaya, at the foot of the pass that leads to the Mondego valley, intending to cross the mountains the moment that Reynier had passed over the Perales defiles with his main body. But seeing the 2nd Corps unexpectedly turning back and concentrating at Zarza, Hill also retraced his steps, and lay at Sarzedas again from August 3rd till September 21st, with his advanced guard at Castello Branco and his cavalry well out to the front along the Spanish frontier, watching every movement of the 2nd Corps. During this time of waiting the Portuguese cavalry of his division had two small but successful engagements with Reynier’s horse, of whom they cut up a squadron on the 3rd of August near Penamacor and another on the 22nd at Ladoeiro, when two officers and sixty men of the Hanoverian Chasseurs à Cheval were killed or taken[313].

Wellington’s doubts as to Masséna’s intentions in the first days of August were provoked not merely by the movements of the 2nd Corps, but by a demonstration made on an entirely new front by General Serras, the officer who had been left with an unattached division to hold the plains of Leon, when Junot and the 8th Corps went off to join the main army on the Agueda. In obedience to Masséna’s orders, on July 27 Serras collected at Benavente as much of his division as could be spared from garrison duty, and moved forward to threaten the frontier of the Tras-os-Montes, far to the north of Portugal. He advanced with some 5,000 men as far as Puebla de Senabria, from which on July 29 he drove out a small Spanish force under General Taboada—the weak brigade which Echevarria had formerly commanded. Silveira immediately collected all the Portuguese militia of his district at Braganza, and prepared to defend the frontier. But Serras unexpectedly turned back, left a battalion of the 2nd Swiss Regiment and a squadron of horse in Puebla de Senabria, and returned to Zamora. The moment that he was gone Silveira and Taboada united their forces, attacked this small detached force, routed it, and shut it up in the town on August 4. It was forced to surrender some six days later, about 20 officers and 350 men, all that remained of 600, being made prisoners. Serras, who had hurried back when he heard of Silveira’s offensive movement, was too late by twelve hours to save his men, and found Puebla de Senabria empty, for the allies had gone off with their prisoners and taken to the mountains. He then retired to Benavente, and Taboada reoccupied Puebla de Senabria, where he was not again disturbed. Serras soon after was drawn away to the north-east by the demands of Bonnet, whose communications with Santander had once more been cut by Porlier’s roving Asturian bands. He called on his colleague to attack this partisan force in the rear, and while Serras was hunting it at Potes and Alba, in the Cantabrian Hills, Northern Portugal and Galicia were left undisturbed in September[314].

While glancing at the subsidiary operations in this remote corner of Spain, it may be worth while to note, as a proof of the slight hold which Bonnet and Serras possessed on their allotted districts, that on June 7 Mahy threatened Astorga, while the Asturian bands of Colonel Barcena, eluding Bonnet, came down into the plains by the Pass of Pajares and surprised Leon[315]. They got into the town by escalade at night, held it for two days, and only evacuated it when Serras came up in strength on June 9. Provoked at this bold adventure, Bonnet made his last attempt to conquer Western Asturias, and so to destroy the indefatigable and evasive partisans in his front. He forced his way across the Narcea and the Navia, and his vanguard had reached Castropol, on the Galician border, upon July 5, when he heard to his disgust that the enemy had slipped behind him. Barcena was threatening his base at Oviedo, while Porlier’s band, carried round by English ships, had landed near Llanes and cut the communication with Santander. These clever moves brought Bonnet back in haste: he evacuated Western Asturias, called up Serras to his aid, and was engaged in August and September in the hunt after Porlier which we have already mentioned[316].

But to return to the main focus of the war in the North. On August 15th Ney’s troops, having at last received the siege-train and a good supply of munitions from Ciudad Rodrigo and Salamanca, broke ground in front of Almeida. Wellington was much relieved at the news, as it was now clear that Masséna was about to besiege the place, and not to mask it and march forward into Portugal. The front which the engineers of the 6th Corps had chosen for attack was that facing the bastion of San Pedro on the south-east front of the town. The first parallel was drawn at a distance of only 500 yards from the walls; it was found very difficult to complete, owing to the shallowness of the earth, and had to be built with gabions and sandbags rather than to be excavated in the rocky subsoil. In many places outcrops of stone came to the surface, and had actually to be blasted away by the sappers, in order to allow of a trench of the shallowest sort being formed. It was clear that the construction of approaches towards the town would present the greatest difficulties, since there was little earth in which to burrow. Between the 17th and the 24th no less than eleven batteries were constructed along the first parallel. They were armed with more than fifty heavy guns, for there was artillery in abundance; in addition to the old siege-train many of the Spanish guns taken in Ciudad Rodrigo had been brought forward. The Portuguese kept up a vigorous but not very destructive fire all the time; but on the 24th they succeeded in preventing the commencement of a second parallel, driving out the workmen before they could cover themselves in the stony ground. At six o’clock on the morning of the 26th August the batteries were all completed and opened fire. Several quarters of the town were in flames before the afternoon, and the guns on the three bastions attacked were unable to hold their own against the converging fire directed on them. But no serious damage had been done to the defences, and the governor was undismayed. At seven o’clock in the evening, however, a fearful disaster occurred—one in its own way unparalleled in magnitude during the whole Peninsular War. The door of the great magazine in the castle had been opened, in order to allow of the sending out of a convoy of powder to the southern ramparts, where the artillery had been hard at work all day. A leaky barrel was handed out, which left a trail of powder behind it along the ground; it was being fixed to the saddle of a pack-ass when a French bomb fell in the courtyard of the castle. In bursting, the bomb chanced to ignite the train; the spark ran along it and exploded another barrel at the door of the magazine, which was still open[317]. This mischance fired the whole store, and in two seconds the castle, the cathedral at its side, and the whole central portion of the town had been blasted out of existence. ‘The earth trembled,’ wrote a French eye-witness, ‘and we saw an immense whirlwind of fire and smoke rise from the middle of the place. It was like the bursting of a volcano—one of the things that I can never forget after twenty-six years. Enormous blocks of stone were hurled into the trenches, where they killed and wounded some of our men. Guns of heavy calibre were lifted from the ramparts and hurled down far outside them. When the smoke cleared off, a great part of Almeida had disappeared, and the rest was a heap of débris[318].’ Five hundred of the garrison perished, including nearly every man of the two hundred artillerymen who were serving the guns on the front of attack. Some inhabitants were killed, but not many, for the majority had taken refuge in the casemates when the bombardment began that morning. It was the unfortunate soldiers who were manning the walls that suffered.

Fearing that the French might seize the moment for an escalade, General Cox ran to the ramparts and, assisted by a Portuguese artillery officer, loaded and fired into the trenches some of the few guns on the south front which were not disabled. He turned out the whole garrison, and kept them under arms that night, lying behind the walls in expectation of an assault which never came. The morning light enabled him to realize the full extent of the disaster; the bastions and curtains had suffered little, the shell, so to speak, of the town was still intact, and the casemates had stood firm, but everything within the enceinte was wrecked. Only five houses in the place had kept their roofs: the castle was a deep hole, like the crater of a volcano: the streets were absolutely blocked with ruins, so that there was no going from place to place save along the ramparts.

There were still 4,000 men under arms; but the officer commanding the artillery reported that thirty-nine barrels of powder, and a few hundred rounds in the small expense-magazines on the ramparts, were all that had escaped the explosion. That is to say, there was not powder in the place to keep up a reply for one day to the batteries of the besieger. The infantry had 600,000 cartridges in their regimental stores (150 rounds per man) but that was of no use for the heavy guns. Moreover, more than half the gunners had perished in the disaster of the previous night—only 200 were left to man nearly 100 guns that were still serviceable. It was clear that Almeida was doomed, since it could not defend itself without powder: but there was a chance that Wellington, whose outposts must have heard and seen the explosion, might think it worth while to dash forward and endeavour to save the garrison during the next twenty-four hours. Therefore Cox resolved to protract his resistance as long as was possible, to give his chief the option of fighting if he should so please. But the defence could not be prolonged for more than a day or two at the most.

At nine on the morning of the 27th Masséna sent in his aide de camp Pelet to demand the surrender of the fortress. Cox had him blindfolded, and taken into a casemate for their interview, so that he might not be able to judge of the awful effects of the explosion. The usual haggling followed—the French officer threatened that the place should be escaladed at once, and the garrison put to the sword. The governor replied that his walls were intact, that he could still defend himself, and that the ‘deplorable accident’ had not appreciably diminished his resisting power[319]. But he finally consented to send out an officer to the French camp to negotiate for terms. All this was merely done to gain time, and the semaphore on the western ramparts was signalling desperate messages to Wellington all the morning.

Cox’s attempt to gain time was fruitless, for a reason that he had not foreseen. The garrison was hopelessly demoralized, knew that it must surrender, and did not see why it should expose itself to another day’s bombardment for a lost cause. During the conference in the casemate General d’Alorna and other Portuguese officers on Masséna’s staff came out of the trenches, and boldly presented themselves at the foot of the walls, calling to their compatriots above and beseeching them to accept the good terms offered, and not to risk their lives for Wellington, who would abandon them just as he had abandoned Herrasti at Ciudad Rodrigo. The officers on the ramparts ought to have driven the renegades away, by shots if necessary; but, far from doing so, they entered into long conversation with them and approved their arguments. D’Alorna recognized some old acquaintances among the regulars, and pledged his word to them that an assault was imminent, and that they were doomed if they made any resistance. What was still more unlucky for Cox was that the officer whom he sent out to the French camp to treat, Major Barreiros of the artillery, was one of those who were most convinced that further defence was fruitless; he divulged the hopeless state of the place to the Marshal, and bade him press his attack without fear, for the garrison would not fight. He himself remained at the French head quarters, and did not return to Almeida. Masséna, therefore, sent back a blank refusal of all Cox’s demands and conditions, and ordered the bombardment to recommence at seven in the evening, while approaches were thrown out from the second parallel towards the ramparts. A feeble musketry fire alone replied.