Other
The Voyage of the Beagle, Second Edition (Online Text)
Charles Darwin's famous journey is chronicled here in this online book. Read it just as it was published in 1845.
Other
The Rise of Evolutionary Biology: Darwin's Ideas
These pages are part of a site called "Evolution," that accompany a textbook by the same name. Mark Ridley is the author. This section is about Darwin, his travels, and his observations that led to "On The Origins Of Species."