Charles Darwin's five-year journey to and from the Galapagos Islands ended in 1836. While that was over two decades before the publication of On the Origin of Species, he credited his time on board the Beagle as a formative experience for his theory of evolution. That extended trip wasn't only spent studying local wildlife, especially during lengthy voyages at sea to and from home—Darwin also devoured a library of more than 400 volumes of text.

While many of those books were referenced in his later research, they were not preserved as a collection once the Beagle returned to England, leaving a gap in our understanding about the books and studies that kept Darwin's mind occupied during such an historic era. Now, thanks to the painstaking efforts of a two-year Beagle project funded by the government of Singapore, that complete on-ship library has been transcribed and posted at Darwin Online, the world's largest repository of Darwin-related texts and writings.

The library, which was stored in the same cabin as Darwin's bed and desk during his journey, totaled out at 195,000 pages by the time researchers at the National University of Singapore assembled the full collection (and these weren't exactly picture books, with only 5,000 corresponding illustrations). The complete list is quite astounding, made up of atlases, history books, geology studies, and even a giant supply of literature. Darwin also enjoyed a few books in French, Spanish, and German, along with a book in Latin about species and a Greek edition of the New Testament.

Historians and fans can read and perform text searches of the fully transcribed library. But if you're pressed for time, we strongly encourage you to at least skim through the collection of gorgeous illustrations.