From Thomas Henry Huxley   21 January 1870

Letter and/or further information available at https://www.darwinproject.ac.uk/letter/DCP-LETT-7084.xml.

Also published in The Correspondence of Charles Darwin, vol. 18

Please cite as “DCP-LETT-7084,” in Ɛpsilon: The Charles Darwin Collection accessed on 17 May 2021, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-7084