Charles Darwin, English naturalist, c 1870s.
© NMeM / Royal Photographic Society / Science & Society Picture Library
Albumen photography by Julia Margaret Cameron (1815-1875). Charles Darwin (1809-1882) was employed as naturalist on HMS Beagle from 1831-1836. He first made his name as a geologist, but is remembered for his momentous contributions to biology - primarily his demonstration that evolution has occurred and his discovery of the principle of natural selection of heritable variation as the cause of evolution. His book 'Origin of Species' was published in 1859. Cameron's photographic portraits are considered among the finest in the early history of photography. She set up a private studio at her Isle of Wight home at the age of 48, after her daughter gave her a camera, and she became expert at using the collodion wet-plate process.