To Asa Gray   16 July [1871]

Letter and/or further information available at https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-7867.xml.

Also published in The Correspondence of Charles Darwin, vol. 19.

Please cite as “DCP-LETT-7867,” in Ɛpsilon: accessed on 25 April 2024, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-7867