At the head of the mutiny was Sébastien le Balp who installed a notary office with the marriage portion of his wife Anne Riou at Kergloff. The 11th July 1675 the situation explose, 6.000 farmers of Saint-Hernin, Kergloff and other parishes around storm the castle of Kergoat at Saint-Hernin. Its owner, Toussaint de Trevigny, was well known for his hardness for the poor farmers and had already lived some smaller mutinies. The rebellion passed, the marquise de Montgaillard de Poullaouen, estimated that more than 200 houses and castles of nobles have been destroyed and plundered. Did our Jean Rioux participate at this mutinner?