Although in this letter of December, 1303, Dolcino recognizes the necessity of concealment, perhaps the expected approaching fruition of his hopes may have encouraged him to relax his precautions. Returning in 1304 to the home of his youth with a few sectaries clad in the white tunics and sandals of the Order, he commenced making converts in the neighborhood of Gattinara and Serravalle, two villages of the Valsesia, a few leagues above Vercelli. The Inquisition was soon upon the track, and, failing to catch him, made the people of Serravalle pay dearly for the favor which they had shown him. Deep-seated discontent, both with the Church and their feudal lords, can alone explain the assistance which Dolcino received from the hardy population of the foot-hills of the Alps, when he was forced to raise openly the standard of revolt. A short distance above Serravalle, on the left bank of the Sesia, a stream fed by the glaciers of Monte Rosa, lay Borgo di Sesia, in the diocese of Novara. Thither a rich husbandman, much esteemed by his neighbors, named Milano Sola, invited Dolcino, and for several months he remained there undisturbed, making converts and receiving his disciples, whom he seems to have summoned from distant parts, as though resolved to make a stand and take advantage of the development of his apocalyptic prophecies. Preparations made to dislodge him, however, convinced him that safety was only to be found in the Alps, and under the guidance of Milano Sola the Apostles moved up towards the head-waters of the Sesia, and established themselves on a mountain crest, difficult of access, where they built huts. Thus passed the year 1304. Their numbers were not inconsiderable--some fourteen hundred of both sexes--inflamed with religious zeal, regarding Dolcino as a prophet whose lightest word was law. Thus contumaciously assembled in defiance of the summons of the Inquisition, they were in open rebellion against the Church. The State also soon became their enemy, for as the year 1305 opened, their slender stock of provisions was exhausted and they replenished their stores by raids upon the lower valleys.[123]
The Church could not afford to brook this open defiance, to say nothing of the complaints of rapine and sacrilege which filled the land, yet it shows the dread which Dolcino already inspired that recourse was had to the pope, under whose auspices a formal crusade was preached, in order to raise a force deemed sufficient to exterminate the heretics. One of the early acts of Clement V. after his election, June 5, 1305, was to issue bulls for this purpose, and the next step was to hold an assembly, August 24, where a league was formed and an agreement signed pledging the assembled nobles to shed the last drop of their blood to destroy the Gazzari, who had been driven out of Sesia and Biandrate, but had not ceased to trouble the land. Armed with the papal commissions, Rainerio, Bishop of Vercelli, and the inquisitors raised a considerable force and advanced to the mountain refuge of the Apostles. Dolcino, seeing the futility of resistance, decamped by night and established his little community on an almost inaccessible mountain, and the crusaders, apparently thinking them dispersed, withdrew. Dolcino was now fairly at bay; the only hope of safety lay in resistance, and since the Church was resolved on war, he and his followers would at least sell their lives as dearly as they could. His new retreat was on the Parete Calvo--the Bare Wall--whose name sufficiently describes its character, a mountain overlooking the village of Campertogno. On this stronghold the Apostles fortified themselves and constructed such habitations as they could, and from it they ravaged the neighboring valleys for subsistence. The Podestà of Varallo assembled the men of the Valsesia to dislodge them, but Dolcino laid an ambush for him, attacked him with stones and such other weapons as the Apostles chanced to have, and took him prisoner with most of his men, obtaining ransoms which enabled the sectaries to support life for a while longer. Their depredations continued till all the land within striking distance was reduced to a desert, the churches despoiled, and the inhabitants driven off.[124]