On August 1, four of the leaders and organizers within the mines, Jose Vicente de Villanueva, Jose Manuel, Jose Hesabino, and Jose Anton Osorino, hired lawyer Manuel Cordero to assist them in drafting a second grievance to be sent to the viceroy.
Violence began at the San Cayetano mine as a mob of workers interrupted a meeting between Pedro Romero de Terreros and Miguel Ramon de Coca.