Letter and/or further information available at https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-666.xml.
Also published in The Correspondence of Charles Darwin, vol. 2.
Please cite as “DCP-LETT-666,” in Ɛpsilon: The Charles Darwin Collection accessed on 9 May 2024, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-666