English: drawn in 1770 by Aguera, a Spanish officer on the warship San Lorenzo, which, accompanied by the frigate Santa Rosalia, was sent by Dom Manuel de Amat y de Junyent, the viceroy of Peru, to explore Easter Island, known as Davis Island, and to study the natives. The San Lorenzo was under the command of Gonzáles de Haedo who called the island San Carlos Island. The map includes three crosses that were erected, on three small hills, by Gonzáles, to signify a claim to the island. The numbers around the island indicate the depth of the water, calculated in units (fathoms) of six Castilian feet. The scale indicates one nautical mile (Archivo de India, Seville).