Republic of Chile Serena Copiapo Vallenar 1855 U.S. Astronomical Expedition mapSheet I Map of the Republic of Chile. Compiled by the U. S. Astron. Expedition from the Surveys of Messrs. Pissis & Allan Campbell. (South America, Republic of Chile, Serena, Vallenar, Copiapo). Issued 1855, Washington by the U. S. Astronomical Expedition. Engraved by Siebert from Herbst. Mid 19th century lithographed map printed on thin bond paper. Very detailed, the key at left identifying gold, copper and silver mines, paths across the Andes and