Charles Darwin stands as an icon in the history of science; a man who completely changed the direction of modern thought by establishing the basis of evolutionary biology. These letters offer a fascinating window onto the scientific observations, personal concerns and friendships of a great thinker, affording a unique glimpse of Darwin as both naturalist and family man. From his early years at Edinburgh University up to the publication of The Origin of Species in 1859, the letters in this volume chart the most exciting years of Darwin's life.