In October 1557, Governor García Hurtado de Mendoza sent another exploratory squad of 70 men under the command of Juan Ladrillero. They were charged with mapping the coastline and surveying the region's flora, fauna, and ethnography. On August 16, 1558, Ladrillero arrived in the Atlantic Ocean, becoming the first navigator to cross the Strait of Magellan in both directions.[1]