Charles Darwin - The Voyage of the Beagle  Complete text of this book by Charles Darwin that documents the observation he made during his famous journey around the world on the HMS Beagle. 

Darwin and Evolution Overview  Provides an excellent summary of Darwin's contributions to evolutionary thought. 

Darwin's "On the Origin of Species" Overview   An excellent summary of the main points made in Darwin's book, highlighting several points that had major impact on nineteenth-century thought. 

Darwin's Precursors and Influences  Provides a clear historical treatment of Darwin's theories and the various influences that helped him develop them. 

The Origin of Species - by Charles Darwin   The complete text of this famous book by Charles Darwin published in 1859. 

What is Darwinism?   The term "Darwinism" has numerous meanings depending on who has used the term and at what period. This page, which is part of the Talk.Orgins site, explains how Darwin's thoughts can be partitioned into about five separate theories.