To Eduard Koch   4 November 1869

Letter and/or further information available at https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-6969.xml.

Also published in The Correspondence of Charles Darwin, vol. 17.

Please cite as “DCP-LETT-6969,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 May 2024, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-6969