At early dawn the Spanish general and his detachment were under arms, and prepared to breast the difficulties of the sierra. These proved even greater than had been foreseen. The path had been conducted in the most judicious manner round the rugged and precipitous sides of the mountains, so as best to avoid the natural impediments presented by the ground. But it was necessarily so steep, in many places, that the cavalry were obliged to dismount, and, scrambling up as they could, to lead their horses by the bridle. In many places too, where some huge crag or eminence overhung the road, this was driven to the very verge of the precipice; and the traveller was compelled to wind along the narrow ledge of rock, scarcely wide enough for his single steed, where a misstep would precipitate him hundreds, nay, thousands, of feet into the dreadful abyss! The wild passes of the sierra, practicable for the half-naked Indian, and even for the sure and circumspect mule, - an animal that seems to have been created for the roads of the Cordilleras, - were formidable to the man-at-arms encumbered with his panoply of mail. The tremendous fissures or quebradas, so frightful in this mountain chain, yawned open, as if the Andes had been split asunder by some terrible convulsion, showing a broad expanse of the primitive rock on their sides, partially mantled over with the spontaneous vegetation of ages; while their obscure depths furnished a channel for the torrents, that, rising in the heart of the sierra, worked their way gradually into light, and spread over the savannas and green valleys of the tierra caliente on their way to the great ocean. Many of these passes afforded obvious points of defence; and the Spaniards, as they entered the rocky defiles, looked with apprehension lest they might rouse some foe from his ambush. This apprehension was heightened, as, at the summit of a steep and narrow gorge, in which they were engaged, they beheld a strong work, rising like a fortress, and frowning, as it were, in gloomy defiance on the invaders. As they drew near this building which was of solid stone, commanding an angle of the road, they almost expected to see the dusky forms of the warriors rise over the battlements, and to receive their tempest of missiles on their bucklers; for it was in so strong a position, that a few resolute men might easily have held there an army at bay. But they had the satisfaction to find the place untenanted, and their spirits were greatly raised by the conviction that the Indian monarch did not intend to dispute their passage, when it would have been easy to do so with success.