Discusses travellers such as Sir Joseph Banks, Heinrich Barth, Henry Walter Bates, George Bentham, Margaret Brooke, Hugh Clapperton, Captain James Cook, Charles Darwin, General Sir Rufane Donkin, Francis Galton, Sir Joseph Hooker, Sir ...
In 1858, Alfred Russel Wallace, aged thirty-five, weak with malaria, isolated in the Spice Islands, wrote to Charles Darwin: he had, he said excitedly, worked out a theory of natural selection.