Notwithstanding the precautions taken to prevent Don Baltasar from leaving Pampeluna, precautions which, as the reader already knows, proved fruitless, Herrera, finding after a lapse of twenty-four hours that no tidings were obtained of the fugitive, resolved not to trust to the chance of his recapture, but at once to execute the plan he had formed when first he became aware of Rita's state of durance. This plan, it will be remembered, was to penetrate clandestinely and with a small force into the enemy's country, to surprise the convent and rescue his mistress. Impracticable when first devised at Artajona, the difficulties besetting the scheme, although diminished by the comparative proximity of Pampeluna to Rita's prison, still appeared almost insuperable. Could the expedition have commenced and terminated between sunset and sunrise, a party of active guerillas, well acquainted with the country and accustomed to such enterprises, might have accomplished it without incurring more than a moderate amount of danger; but, at that season of the year especially, a great part of the march would have to be made in broad daylight, through a district whose population was exclusively Carlist, and which was occupied by detachments and garrisons of the Pretender's troops. Indeed the risk was so great and manifest, and the chances of success apparently so slender, that Cordova, when applied to by Herrera, at first positively refused to allow him to go on so mad an expedition. He at last yielded to the young man's reiterated entreaties, and even permitted Torres to accompany his friend, but refused to give them any troops of the line, saying, however, that the Mochuelo might go, if willing. That he was so, the reader, after the glimpse that has been given of the guerilla's daring character and impatience of inaction, will have small difficulty in conjecturing. He acknowledged that the proposed expedition was most difficult and dangerous; but confident in his own resources, and in the men under his command, he by no means despaired of its being successful. He should have liked, he said, to postpone it for two or three days, in order to send out spies and ascertain the exact position of the Carlist troops; but on learning from Herrera how urgent it was to lose no time, and how fatal might be the delay of even a single day, he made no further difficulties, but agreed to start at once.