plot to the Spanish authorities. Spanish and Filipino colonial troops were sent by Governor-General Santiago de Vera, and the leaders of the revolt were arrested and summarily executed by Christian Cruz-Herrera. Tondo Conspiracy (1587–1588) The Tondo Conspiracy, or the Conspiracy of the Maginoos, of 1587–1588, was a plot by the kin-related noblemen, or datus, of Manila and some towns of Bulacan and Pampanga. It was led by Agustin de Legazpi, nephew of Lakandula, and his first cousin, Martin Pangan. The datus swore to revolt. The uprising failed when they were denounced to the Spanish authorities by Antonio Surabao (Susabau) of Calamianes, in Palawan. Revolts Against the Tribute (1589) The Cagayan and Dingras Revolts Against the Tribute occurred on Luzon in the present-day provinces of Cagayan and Ilocos Norte in 1589. Ilocanos, Ibanags, and other Filipinos revolted against alleged abuses by the tax collectors, including the collection of high taxes. It began when six tax collectors who had arrived from Vigan were killed by the natives. Governor-General Santiago de Vera sent Spanish and Filipino colonial troops to pacify the rebels. The rebels were eventually pardoned and the Philippine tax system reformed. Magalat Revolt (1596) The Magalat Revolt was an uprising in 1596, led by Magalat, a rebel from Cagayan. He had been arrested in Manila for inciting rebellion against the Spanish. He was later released after some urging by some Dominican priests, and returned to Cagayan. Together with his brother, he urged the entire country to revolt. He was said to have committed atrocities against his fellow natives for refusing to rise up against the Spaniards. He soon controlled the countryside, and the Spanish eventually found themselves besieged. The Spanish Governor-General Francisco de Tello de Guzmán sent Pedro de Chaves from Manila with Spanish and Filipino colonial troops. They fought successfully against the rebels, and captured and executed several leaders under Magalat. Magalat himself was assassinated within his fortified headquarters by his own men. 17th century Igorot Revolt (1601) By order of the Governor-General Francisco de Tello de Guzmán an expedition was sent to the Cordillera region for religious conversion purposes with the aid of Padre Esteban Marin. Marin, the curate of Ilocos at that time, tried initially to convince the Igorots to convert peacefully to Catholicism. Marin allegedly even tried to create his own dictionary in the Igorot language to advance this cause. The Igorots, however, killed Marin and the