Chapter 18: 1566. The earliest technical account is that of Father Joseph De Acosta
(_Historia Natural y Moral de las Indias_, Seville, 1590, English trans.
Edward Grimston, London, 1604, re-published by the Hakluyt Society,
1880). Acosta was born in 1540, and spent the years 1570 to 1585 in
Peru, and 1586 in Mexico. It may be noted that Potosi was discovered in
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