Gregory XI. was especially zealous in the warfare with heresy, and we have already seen how earnest were his efforts in 1375 to suppress the Waldenses of Provence and Dauphiné. Those of Piedmont had rendered themselves peculiarly obnoxious. Frà Antonio Pavo had recently gone to “Bricarax,” a place deeply infected with heresy, to preach against them--his sermon, of course, including a summons before his tribunal--when in place of humbly submitting, a dozen of them, incited by the Evil One, had set upon him as he left the church and had slain him. Another inquisitor, probably Pietro di Ruffia, had met the same fate in the Dominican cloister at Susa, on the day of the Purification of the Virgin (February 2). Such misdeeds demanded exemplary chastisement, and Gregory’s exhortations to Charles V. of France were accompanied with the strongest urgency on Amadeo VI. of Savoy to clear his land of brambles. We have seen how successful were the labors of the Nuncio, Antonio Bishop of Massa, and the Inquisitor of Provence, François Borel. They did not confine their energies to the French valleys. The Waldenses of the Val di Susa were exposed to the most pitiless persecution; on a Christmas night Borel with an armed force attacked Pragelato, putting to the sword all whom he could reach. The wretches who escaped perished of hunger and cold, including, it is said, fifty women with children at the breast.[295] It may be hoped that this holocaust satisfied the manes of the murdered inquisitors, for they seem to have received no other satisfaction. A succession of inquisitors--Piero di Castelmonte, Ruffino di Terdona, Tommaso da Casacho, and Michele Grassi, undaunted by the fate of their predecessors, wasted their energies on the Piedmontese Waldenses without reducing them to subjection. The pitiless forays of Borel drove the poor wretches from their native valleys, and they poured over into Piedmont. Amadeo VII., who succeeded his father in 1383, seems to have given the Inquisition but slender support, and it had little encouragement in its efforts to subdue the stubborn mountaineers. The fragmentary records of Frà Antonio Secco, who undertook the work in the spring of 1387, show how fruitless was the endeavor to co-operate with the ruthless proselytism of Borel. It is true that he caught Isabel Ferreria, the wife of Giovanni Gabriele, one of the murderers of Antonio Pavo, and had the satisfaction of torturing her, but he could get no evidence against her, and could only learn that her husband had died in 1386. Some other suspects he tortured and penanced with crosses: apparently he had no prisons at his disposal in which to incarcerate them. Accusations and denunciations poured in to him by the hundred, showing that the land was alive with heretics, but he was powerless to inflict on them punishment that would make an impression. One of his first cases had been a certain Lorenzo Bandoria, who had abjured before Antonio Pavo, and who under