Letter and/or further information available at https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-4540.xml.
Also published in The Correspondence of Charles Darwin, vol. 12.
Please cite as “DCP-LETT-4540,” in Ɛpsilon: accessed on 2 May 2024, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-4540