Henry Walter Bates, Wallace's early mentor, was a
naturalist and explorer whose work on animal mimicry (the imitation
of other life forms or inanimate objects by a particular species)
backed up Darwin's theory of evolution. Bates introduced Wallace
to entomology and travelled with him to explore the Amazon and
collect data there.
Charles Darwin is perhaps the single most important
scientist of the nineteenth century. His work on natural selection
was the highlight of a lengthy and varied career. His friendship
with Wallace was based on mutual admiration and a genuine regard
for each other's work.
Sir Joseph Hooker was an internationally renowned
botanist and Director of the Royal Botanical Gardens at Kew until
1885. He was a close friend of Charles Darwin and often advised
A.R. Wallace.
Thomas Huxley, like Hooker, was a close companion of Charles Darwin. He became known as "Darwin's Bulldog" as a result of his strong advocacy of Darwin's theories. He also served as President of the Royal Society.