This system of hostages seemed probable enough to their questioners, and if the boys' fare was rather harder, and their treatment more unceremonious than it would have been had they said that they were British officers in disguise, they ran far less risk of detection from an accidental word or sign. Indeed it would have been next to impossible for them, had they desired it, to convince any one of their identity. There was no fear now of their accent betraying them. Since they had left the army they had never, even when alone together, spoken in English. They made the rule and kept to it for two reasons, the one being that they found that if they did not get into this habit of always speaking Spanish, they might inadvertently address each other in English, and thus betray themselves; the second, that they wanted to learn to speak absolutely like natives. This they had in the four months thoroughly learned to do. At first their pronunciation and occasional mistakes excited curiosity when asked questions as to the part of Spain from which they had come, but their constant communication with their muleteer friends had quite removed this, and for the last two months not one person had doubted that they were not only Spanish, but that they came from the northern provinces. Hitherto they had journeyed principally between large towns and over country held by the French, but that part of their work was finished; they had accurately computed the number of the army with which Massena was to advance shortly to besiege Ciudad Rodrigo, and they had now to carry the despatches to the guerilla leaders. Hitherto they had not in a single instance excited suspicion. Not a Frenchman had asked them a question, and no adventure of anything like an exciting nature had taken place. They were now, however, entering into a country entirely different from that which they had hitherto traversed. The northeast of Spain is wild and mountainous, and offers immense natural facilities for irregular warfare. Through the various passes of the Pyrenees lead all the roads from France, whether to Vittoria on the great road to Madrid, or through Navarre to Catalonia. Here and there fortified towns still held out against the French, and the town of Gerona, in Catalonia, had only fallen after a six months' regular siege, and a desperate defense which fully rivals that of Saragossa. Is it not a little singular that the Spaniards, who in the open field were, with a few remarkable exceptions, absolutely contemptible, yet frequently defended towns with wonderful fortitude, courage, and desperation. It may, indeed, be said that in every siege where the Spaniards were commanded by brave and resolute chiefs they behaved admirably. This great range of hill country was the stronghold of the guerillas, and every convoy from France had to be protected by a large force, and even then often suffered greatly from the harassing attacks of their active enemies.