Heudelet and Lamartinière had now some 7,000 men collected at Tuy, a force with which they could easily have routed the whole of the insurgents of the Minho, and forced them to retire into the mountains. But Soult’s orders to his lieutenants were to avoid operations in Galicia, and to concentrate towards Portugal. Tuy was evacuated, and its garrison transferred across the frontier-river to the Portuguese fortress of Valenza. Before the transference was completed, the French generals received an unexpected visit from some troops of the 6th Corps. Ney, disquieted as to the condition of Tuy and Vigo, had sent a brigade under Maucune to seek for news of their garrisons. This force, cutting its way through the insurgents, came into Tuy on April 12. Thus Heudelet was at last able to get news of the operations of Ney. The information received was not encouraging: the Duke of Elchingen was beset by the Galicians on every side: La Romana had cut off one of his outlying garrisons, that of Villafranca, and his communications with Leon were so completely cut off that he had no reports to give as to the progress of affairs in the rest of Spain. Finding that Vigo was lost, and the garrison of Tuy relieved, Maucune retraced his steps and returned to Santiago, harassed for the whole of his march by the insurgents of the coast-land.
Meanwhile Heudelet’s communication with Oporto had been interrupted, for the Portuguese, routed on the Lima a week before, had come back to their old haunts, seized Braga, and blocked the high-road and the bridges. Soult only got into touch with his expeditionary force by sending out Lahoussaye with 3,000 men to reopen the road to the North. When this was done, he bade Heudelet evacuate Valenza (whose fortifications turned out to be in too bad order to be repaired in any reasonable space of time), and to disperse his division in garrisons for Braga, Viana, and Barcelos. The whole of the convoy and the sick from Tuy were sent up to Oporto.
The net result of Heudelet’s operations was that the Marshal, at the cost of immobilizing one of his four infantry divisions, obtained a somewhat precarious hold upon the flat country of Entre-Douro-e-Minho. The towns were in his hands, but the Ordenanza had only retired to the hills, and perpetually descended to worry Heudelet’s detachments, and to murder couriers and foraging parties. Meanwhile 4,000 men were wasted for all purposes of offensive action. Vigo, Tuy, and Valenza had all been abandoned, and touch with the army of Galicia had been completely lost.
Even this modest amount of success had been denied to Soult’s second expedition, that which he had sent under Loison towards the Tras-os-Montes. The enemy with whom the French had to deal in this region was Silveira, the same officer who had been defeated between Monterey and Chaves in the early days of March, when the 2nd Corps crossed the Portuguese frontier. He had fled with the wrecks of his force towards Villa Real, at the moment when Soult marched on Braga, and the Marshal had fondly hoped that he was now a negligible quantity in the campaign. This was far from being the case: the moment that Silveira heard that the French had crossed the mountains and marched on Braga, he had rallied his two regular regiments and his masses of Ordenanza, and pounced down on the detachment under Commandant Messager, which Soult had left in garrison at Chaves. This, it will be remembered, consisted of no more than a company of infantry, a quantity of convalescents and stragglers, and the untrustworthy Spanish-Portuguese ‘legion,’ which had been formed out of the prisoners captured on March 6 and 12[316]. On the very day upon which Soult was routing Eben in front of Braga, Silveira appeared before the walls of Chaves with 6,000 men. Messager retired into the citadel, abandoning on the outer walls of the town a few guns, which the Portuguese were thus enabled to turn against the inner defences. After a siege of five days and much ineffective cannonading, the governor surrendered, mainly because the native ‘legion’ was preparing to open the gates to Silveira. Twelve hundred men were captured, of whom only one-third were Frenchmen capable of bearing arms, the rest being sick or ‘legionaries.’
Having made this successful stroke, Silveira marched down the Tamega to Amarante, making a movement parallel to Soult’s advance on Oporto. His recapture of Chaves brought several thousands more of Ordenanza to his standard, and at Amarante he was joined on the thirtieth by many of the fugitives who had escaped from the sack of Oporto on the previous day. He spread his army, now amounting to 9,000 or 10,000 men, along the left bank of the Tamega, whose bridges and fords he protected with entrenchments. Advanced guards were pushed out on the further side of the river on the three roads which lead to Oporto.
When, therefore, the troops under Loison, which Soult had sent out towards the Tras-os-Montes, drew near the Tamega, they found the Portuguese in force. The cavalry could get no further forward than Penafiel; when Foy’s infantry came up (April 7) Loison tried to force the enemy back, both on the Amarante and on the Canavezes road. He failed at each point, and sent back to the Marshal to ask for reinforcements. Seeing him halt, Silveira, whose fault was not a want of initiative, actually crossed the river with his whole army, and fell upon the two French brigades. He was checked, but not badly beaten, and Loison remained on the defensive (April 12).
At this moment Soult heard of the fall of Chaves, full seventeen days after it had happened. Realizing that Silveira was now growing formidable, he sent to Loison’s aid General Delaborde with the second of his infantry brigades, and Lorges’ dragoons. These reinforcements brought the troops facing Silveira up to a total of some 6,500 men—nearly a third of Soult’s whole disposable force. As Heudelet was still absent on the Minho with 4,000 men more, the Marshal had less than 10,000 left in and about Oporto. It was clear that the grand march on Lisbon was not likely to begin for many a long day.
On April 18 Loison advanced against Silveira, who boldly but unwisely offered him battle on the heights of Villamea in front of Amarante. Considering that he had but 2,000 regulars and 7,000 or 8,000 half-armed militia and Ordenanza, his conduct can only be described as rash in the extreme. He was, of course, beaten with great loss, and hustled back into the town of Amarante. He would have lost both it and its bridge, but for the gallantry of Colonel Patrick, an English officer commanding a battalion of the 12th of the line, who rallied his regiment in the streets, seized a group of houses and a convent at the bridge-head and beat off the pursuers[317]. Patrick was mortally wounded, but the passage of the river was prevented. This saved the situation: Silveira got his men together, planted his artillery so as to command the bridge, and took post in entrenchments already constructed on the commanding heights on the left bank. Next day Loison stormed the buildings at the bridge-head, but found that he could get no further forward. The town was his, but he could not debouch from it, as the bridge was palisaded, built up with a barricade of masonry and raked by the Portuguese artillery. Soult now sent up to aid Loison still further reinforcements, Sarrut’s brigade of infantry from Merle’s division and the second brigade of Lahoussaye’s dragoons. Thus no less than 9,000 French troops, nearly half the army of Portugal, were concentrated at Amarante.
The fact that twelve whole days elapsed between the arrival of these last succours and the forcing of the passage of the Tamega had no small influence on the fate of Soult’s campaign. Hitherto the initiative had lain with him, and he had faced adversaries who could only take the defensive. This period was nearly at an end, for on April 22 Wellesley had landed at Lisbon, the English reinforcements had begun to arrive, and an army, differing in every quality from the hordes which the Marshal had encountered north of the Douro, was about to assume the offensive against him. By the time that Loison at last forced the bridge of Amarante, the British were already on the march for Coimbra and Oporto.
Silveira and his motley host, therefore, were doing admirable service to the cause of their country when they occupied 9,000 out of Soult’s 21,000 men from April 20 to May 2 on the banks of the Tamega. The ground was in their favour, but far stronger positions had been forced ere now, and it was fortunate that this one was maintained for so many days. The town of Amarante, it must be remembered, lies on comparatively low ground: its bridge is completely commanded by the heights on which Silveira had planted his camp and his batteries. The river flows in a deep-sunk ravine, and was at this moment swollen into an impassable torrent by the melting of the mountain snows. Loison more than once sent swimmers by night, in search of places where the strength of the current might be sufficiently moderate to allow of an attempt to pass on rafts or boats. Not one of these explorers could get near the further bank: they were swept off by the rushing water and cast ashore far down stream, on the same side from which they had started. There had been bridges above Amarante at Mondim and Aroza, and below it at Canavezes, but reconnaissances showed that they had all three been blown up, and that Portuguese detachments were watching their ruins, to prevent any attempt to reconstruct them. Loison found, therefore, that he could not turn Silveira’s position by a flanking movement: there was nothing to do save to wait till the river should fall, or to attempt to force the bridge of Amarante at all costs. Continual rains made it hopeless to expect the subsidence of the Tamega for many days, wherefore Loison devoted all his energies to the task of capturing the bridge. Even here there was one difficulty to be faced which might prove fatal: the French engineers had discovered that the structure was mined. It was necessary, therefore, not only to drive back the Portuguese, but to prevent them from blowing up the bridge at the moment of their retreat.