Talcapillán's allegations and map
In the early 1670s the English sailor John Narborough explored the coasts of Patagonia. This caused great alarm among Spanish authorities who feared the establishment of an English base in Patagonia. As concequence various expeditions were sent from the Spanish settlements of Chiloé to the south. Jerónimo Díaz de Mendoza led an expedition in 1674 that having failed to find any Europeans in Patagonia went back to Chiloé with Cristóbal Talcapillán and other indigenous Chono they encountered. In 1674 he was about 25 years old according to estimations of the Spanish. In Chacao Cristóbal Talcapillán rapidly learned Veliche which was the main language of Chiloé –including the Spanish settlements– at the time. While there he began to give indications about the existence of European settlements in the archipelagoes of Patagonia. Spanish authorities learned about this and interviewed him. He drew accurate "maps" of the territory south of Chiloé giving credibility to his allegations. Authorities went was far as sending Cristóbal Talcapillán to Lima, the capital of the viceroyalty, to investigate his claims. Cristóbal Talcapillán was sent back to Chiloé and it was then decided that a major expedition should be sent to the verify the presence of Englishmen or other Europeans.Guide and translator in the Antonio de Vea expedition
Thus an expedition led by Antonio de Vea departed from