Upon the morning of the 26th of August the French batteries opened fire, and from Guarda the dull, heavy roar of artillery could be heard all day. As darkness fell, the officers of the Rangers were, as usual, assembling round their fire, when the earth seemed to shake beneath their feet, and a flash like that of summer lightning lit the eastern sky. "What can that be?" was the general exclamation. A minute later, and a deep, heavy, prolonged roar sounded in their ears--then all was quiet. "That is a big magazine," Captain Manley said, "and I'm afraid it's the town, for it sounded too heavy for a mere field magazine. If it be the town, you'll see it won't hold out much longer; even if the actual damage is not very great, a great explosion always damages the morale of a defense, and in that case we shall have Massena upon us, and there will be wigs on the green ere many days are over." Captain Manley's conclusions were correct. The magazine of Almeida had exploded with terrific effect. Only six houses were left standing in the town, a considerable portion of the ramparts was thrown down, and five hundred people killed on the spot. The stones were hurled in all directions with such force that forty of the besiegers were hurt in the trenches. Colonel Cox, who commanded, endeavored to rally the panic-stricken garrison, and upon the following morning attempted to negotiate with Massena, who sent an officer to demand instant surrender. Defense was, in fact, impossible, but Colonel Cox attempted to negotiate, because he hoped that Wellington would at once advance to his rescue. His intentions were frustrated, however, by the treachery and mutiny of the principal Portuguese officers under him, and the French at once took possession of the ruins. The British army fell back a short distance when the news of the disaster arrived, and a fortnight of great anxiety and watchfulness passed, as it was not certain by which road or roads Massena would advance. It was not until the 18th of September that Massena fairly commenced his march, having chosen the road from Visen through Martagoa, and the next day the news reached the Rangers that the British army was to concentrate on the heights of Busaco. "So we are going to have a fight for it," Carruthers said to the boys, as the officers assembled in readiness to take their places when the troops had fallen in. "What will be the end of it?" "We shall lick them," an old captain said, "though they are two to one, and then they will march round us somehow, and then we shall have to fall back in all haste on Lisbon, and embark there, and we shall eat our Christmas dinner in England." There was a general murmur of assent, for at that time the belief was almost universal in the British army that they would be forced to abandon Portugal.