To Edward Vivian   23 August [1872]

Aug. 23d

One line to thank you for valuable information. The more I investigate the extreme amount of work effected, the more perplexed as yet I become.1

Thanks.— C. Darwin

The information may have related to CD’s research on worms. No letter from Vivian has been found.

Please cite as “DCP-LETT-8485,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-8485