From Fritz Müller   22 April 1868

Letter and/or further information available at https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-6140.xml.

Also published in The Correspondence of Charles Darwin, vol. 16.

Please cite as “DCP-LETT-6140,” in Ɛpsilon: The Charles Darwin Collection accessed on 8 May 2024, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-6140