Patagonia

Two hydrographic surveys of the coasts were of first-rate importance: the first expedition (1826–1830) including HMS "Adventure" and HMS "Beagle" under Phillip Parker King, and the second (1832–1836) being the voyage of the "Beagle" under Robert FitzRoy. The latter expedition is particularly noted for the participation of Charles Darwin; however nothing was observed of the interior of the country except for 200 miles (320 km) of the course of the Santa Cruz river.