The two Promaucians who alone had escaped from the fatal battle of Tucapel, by favour of the darkness and under covert of a thick wood, reached Conception, which they filled with grief and consternation, by relating the total overthrow and massacre of the army of Valdivia.  When the general terror and dismay had a little subsided, the magistrates proceeded to open the sealed instructions which had been left with them by Valdivia, when he departed on his late fatal expedition.  In these he named Alderte, Aguirre, and Villagran successively to the vacant government in case of his own decease.  Alderte being gone to Europe, and Aguirre absent on his expedition into the distant province of Cujo, the command devolved on Villagran.  After such preparations as appeared necessary under the present emergency, Villagran crossed the Biobio with a considerable army of Spaniards and Promaucian auxiliaries, intending to march for Arauco in the first place.  In a narrow pass at no great distance to the south of the Biobio, he was vigorously opposed by a body of Araucanian warriors, who withstood the utmost efforts of his army for three hours, and then withdrew continually fighting, towards the top of the mountain where Lautaro awaited the approach of the Spaniards with the main body of his army, in a well chosen post defended by a strong palisade.  Villagran ordered the squadrons of cavalry to force their way up the difficult passage of the mountain, which they effected with infinite difficulty and severe fatigue, and were received at a short distance from the summit by showers of stones, arrows, and other missiles, which were incessantly discharged against them by the vigilant and brave Araucanians.  Villagran, who followed his cavalry at the head of all the infantry of his army, with six pieces of artillery, seeing the determined opposition of the enemy, several detachments of whom were endeavouring to gain his flanks and rear, ordered his musquetry to advance, and the artillery to take a favourable position for annoying the enemy.

The mountain was enveloped in smoke, and resounded on all sides with the thunder of the Spanish cannon and musquets, while the balls were heard whistling in every direction, and dealing destruction among the ranks of the valiant Araucanians, who continued vigorously to defend their post, undismayed at the numbers who fell amid their thick array.  Perceiving that his principal loss was occasioned by the cannon, Lautaro gave orders to one of his bravest officers, named Leucoton, to sally from the camp with a select detachment of troops, and to gain possession of the cannon at all events, or never more to appear in his presence.  Leucoton executed his orders with the utmost bravery, and after a furious and bloody contest with the guard of the guns, carried them off in triumph; while Lautaro, to prevent the Spaniards from sending succours to their artillery, made a furious general attack on the whole line with all his troops.  Astonished by this