Relacion del ultimo viage al Estrecho de Magallanes (Madrid, 1788)

The frigate Santa Maria de la Cabeza surveyed the Strait of Magellan in 1785-86 with marine chronometers borrowed from the Cadiz observatory, and the book published from its officers' diaries did two unusual things: it stated the expedition's motives itself, naval, scientific and fiscal in that order, and it went back to the manuscript journals of the sixteenth century to establish that the Patagonian giants were never in them.