It would be erroneous to suppose, that, during the late war in Spain, adherents of Don Carlos were only to be found in the districts in which his standard was openly raised. In many or most of the towns best affected to the liberal cause, devoted partisans of the Pretender continued to reside, conforming to the established order of things, and therefore unmolested. In most instances their private opinions were suspected, in some actually known; but a few of them were so skilful in concealing their political bias and partialities, as to pass for steady and conscientious favourers of the Queen's government. Here was one and no unimportant cause of the prolongation of the war; the number of spies thus harboured in the very heart of the Christino camp and councils. By these men intelligence was conveyed to the Carlists, projected enterprises were revealed, desertion amongst the soldiery and disaffection amongst the people, stimulated and promoted. Many of these secretly-working agents were priests, but there was scarcely a class of the population, from the nobleman to the peasant, and including both sexes, in which they were not to be found. Innumerable were the plans traversed by their unseen and rarely detectable influence. On many a dark night, when the band of Zurbano, El Mochuelo, or some other adventurous leader, issued noiselessly from the gates of a town, opened expressly for their egress, to accomplish the surprise of distant post or detachment, a light in some lofty window, of no suspicious appearance to the observer uninformed of its meaning, served as a beacon to the Carlists, and told them that danger was abroad. The Christinos returned empty-handed and disappointed from their fruitless expedition, cursing the treachery which, although they could not prove it, they were well assured was the cause of their failure.