Table 2. The following resources provide valuable background about Darwin's life and the Beagle expedition.
Unabridged version of the Voyage of the Beagle
http://darwin-online.org.uk/content/frameset?itemID=F20&viewtype=text&pageseq=1
Additional resources about the voyage
Interactive website on the Beagle voyage from the Natural History Museum, London: http://www.nhm.ac.uk/nature-online/science-of-natural-history/expeditions-collecting/beagle-voyage/index.html
Pages on the expedition at the “About Darwin.com” website: http://www.aboutdarwin.com/voyage/voyage03.html
Additional background on Darwin's life
Janet Browne's two-volume biography (Browne, 1995; 2002) or her shorter work focusing on the Origin of Species (Browne, 2006)
Darwin Online, which includes pdfs of all of Darwin's books and manuscripts, transcriptions of his notebooks, and valuable introductions to his works, including the Voyage of the Beagle: http://darwin-online.org.uk