,

Mystery looms over a valuable set of Charles Darwin notebooks that went from 'lost' to 'likely stolen' | CNN,

Missing Charles Darwin notebooks returned to Cambridge University - Art & Culture - The Jakarta Post,

Amazon.com: Charles Darwin's Notebooks, 1836–1844: Geology, Transmutation of Species, Metaphysical Enquiries: 9780521099752: Barrett, Paul H., Gautrey, Peter J., Herbert, Sandra, Kohn, David, Smith, Sydney: Books,

Charles Darwin's Notebooks, 1836–1844: Geology, Transmutation of Species, Metaphysical Enquiries