"Read and search the full texts of more than 8,500 of Charles Darwin’s letters, and ﬁnd information on 6,500 more. Discover complete transcripts of all known letters Darwin wrote and received up to the year 1871."
"On this site, you will find the world's first & only large collection of full colour, high-resolution images of faithfully transcribed Darwin manuscripts. These manuscripts record Charles Darwin's work as a practicing scientist. Whether you are a student or a researcher, our goal is to offer you digital access to the primary evidence for the birth and maturation of Darwin's attempts to explore and explain the natural world. "