To J. F. W. Herschel   23 May [1861]

Letter and/or further information available at https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-3154.xml.

Also published in The Correspondence of Charles Darwin, vol. 9.

Please cite as “DCP-LETT-3154,” in Ɛpsilon: accessed on 16 April 2024, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-3154