gutenberg_org, 
Joint reading of Charles Darwin and Alfred Russel Wallace's papers on evolution to the Linnean Society of London #OTD in 1858.
This presentation was sponsored by Joseph Hooker and Charles Lyell as neither author could be present. via @Wikipedia
Books by Charles Darwin at PG:
https://www.gutenberg.org/ebooks/author/485Books by Alfred Russel Wallace at PG:
https://www.gutenberg.org/ebooks/author/955
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