To William Marshall 6 June [1872]1
Down, | Beckenham, Kent.
June 6th.
Dear Sir
Permit me to trouble you with a few lines to thank you for your kindness in having sent me various interesting publications; especially one on the structure of man in relation to the lower animals, & a second, received only a few days since, on the osseous protuberances of the skulls of Birds.2 I have been particularly glad to see this latter memoir, & have seldom been more interested than by your statement that these protuberances appear early in life in those species in which both sexes are thus furnished, & late in life in those in which the males alone possess them.3 This is a parallel case to that given by me in the Descent of Man about the horns of the Rein-Deer; & I believe that the fact has a very important bearing on the acquisition of sexual characters.4
It has pleased me much to observe that you admit to a considerable extent the influence of sexual selection.5
With much respect & my best thanks, I remain, Dear Sir | Yours faithfully | Ch. Darwin
Footnotes
Bibliography
Descent 2d ed.: The descent of man, and selection in relation to sex. By Charles Darwin. 2d edition. London: John Murray. 1874.
Descent: The descent of man, and selection in relation to sex. By Charles Darwin. 2 vols. London: John Murray. 1871.
Marshall, William. 1870. Ueber Thieraehnlichkeiten der Menschen. [Read 17 November 1870.] Niederländisches Archiv für Zoologie 1 (1871–3): 113–131.
Marshall, William. 1871. Sur les plumes caudales allongées des oiseaux de paradis. Archives Néerlandaises des sciences exactes et naturelles 6: 296–304.
Summary
Thanks WALM for having sent interesting publications, especially the one on relation of structure of man to lower animals,
and just a few days since, on protuberances on bird skulls. WALM’s facts on the latter subject have an important bearing on the acquisition of sexual characters. CD is pleased that the influence of sexual selection is admitted.
Letter details
- Letter no.
- DCP-LETT-8371A
- From
- Charles Robert Darwin
- To
- William Adolf Ludwig (William) Marshall
- Sent from
- Down
- Source of text
- Smithsonian Libraries and Archives (Dibner Library of the History of Science and Technology MSS 405 A. Gift of the Burndy Library)
- Physical description
- ALS 4pp
Please cite as
Darwin Correspondence Project, “Letter no. 8371A,” accessed on 25 April 2024, https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-8371A.xml
Also published in The Correspondence of Charles Darwin, vol. 20