In 1570, another decree was published, forbidding the Vaudois to assemble together, under a fine of one hundred crowns; their refusal of obedience to this order, which so clearly violated their privileges, greatly irritated Castrocaro, who was particularly enraged at the recent construction of the fort of Mirabouc, on which depended the only issue of the val Luzerne towards France, and would undoubtedly have proceeded to great extremities against the inhabitants of Bobbi, had he been allowed. Strict searches were also made after some of the Vaudois, who were accused of having assisted the Protestants in France; until Charles the Ninth requested the Duke of Savoy to forgive them, as he had already done his own Protestant subjects.

In 1571, at a general assembly of the heads of families, six articles, called "the articles of the union of the valleys," were drawn up; the object of which was to bind themselves by still more solemn ties to persevere in their religious faith, and in obedience to their prince, when his orders were not contrary to their conscience. The news of the massacre of St. Bartholomew, in that same year, gave them the utmost disquietude, and the more so, as Castrocaro manifested his intention to inflict the same punishment on all the French refugees he could find; until he received the Duke's order to desist.

A sudden attack was made about this time by order of the parliament of Pignerol, upon St. Germain, in val Perouse, by Charles de Birague, an officer in the French service; but he was repulsed, after taking five Vaudois prisoners, who were hanged by the Papists.

Peace was soon after concluded; and in consequence of Henry the Third passing through Turin, on his way from Poland, to take possession of the crown of France, the town of Pignerol and the valley of Perouse were restored to the Duke of Savoy, from whose territory they had been separated by Francis the First.