To C. G. Semper 30 April 1877
[Down.]
[…] I shall consider your dedication as a high & most gratifying honour.1 Your observation on the dorsal eyes of Onchidium are interesting & surprising in the highest degree.2 That the same animal should be provided with eyes of two widely different types is remarkable enough; but that you should have discovered gradations in the scale of their development on the same individual is most wonderful & shows us probably by what steps they were developed. On two occasions I have found gradations on the same individual but in structures of comparatively small importance, namely in the tendrils of the vine & in the ocelli on the feathers of the argus pheasant.3 Even theses cases interested me much though they are quite trifling compared with your case.
There is much truth in what you say about photographs in comparison with published memoirs or books; but the generous sympathy which I have received from so many men in Germany & Holland, some of them distinguished workers in science, has naturally given me much pleasure—4
Allow me to repeat that your intended dedication will always be considered by me as a very high honour, & I return you my most sincere thanks | Believe me, my dear Sir | Yours sincerely, | Charles Darwin
Footnotes
Bibliography
Climbing plants: On the movements and habits of climbing plants. By Charles Darwin. London: Longman, Green, Longman, Roberts & Green; Williams & Norgate. 1865.
Descent: The descent of man, and selection in relation to sex. By Charles Darwin. 2 vols. London: John Murray. 1871.
Summary
Is honoured by CGS’s dedication [see 10942].
His observation of the dorsal eyes of Onchidium is interesting and surprising.
Letter details
- Letter no.
- DCP-LETT-10945F
- From
- Charles Robert Darwin
- To
- Carl Gottfried Semper
- Sent from
- Down
- Source of text
- J. A. Stargardt (dealers) (March 1994); Kotte Autographs (dealers) (March 2016)
- Physical description
- LS 4pp inc
Please cite as
Darwin Correspondence Project, “Letter no. 10945F,” accessed on 28 March 2024, https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-10945F.xml