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To C. G. Semper   30 April 1877

Summary

Is honoured by CGS’s dedication [see 10942].

His observation of the dorsal eyes of Onchidium is interesting and surprising.

Author:  Charles Robert Darwin
Addressee:  Carl Gottfried Semper
Date:  30 Apr 1877
Classmark:  J. A. Stargardt (dealer) (March 1994); Kotte Autographs (dealer) (March 2016)
Letter no:  DCP-LETT-10945F

To C. G. Semper   18 July 1877

Summary

Thanks for CGS’s work [“Über Schneckenaugen” (1877)].

Author:  Charles Robert Darwin
Addressee:  Carl Gottfried Semper
Date:  18 July 1877
Classmark:  Universitäts- und Landesbibliothek Düsseldorf (slg 60/Dok/56)
Letter no:  DCP-LETT-11061

To C. G. Semper   19 July 1878

Summary

Offers to give CGS a writing machine.

Author:  Charles Robert Darwin
Addressee:  Carl Gottfried Semper
Date:  19 July 1878
Classmark:  Universitäts- und Landesbibliothek Düsseldorf (slg 60/Dok/57)
Letter no:  DCP-LETT-11617

To C. G. Semper   24 July [1878]

Summary

Pleased CGS will accept machine.

Author:  Charles Robert Darwin
Addressee:  Carl Gottfried Semper
Date:  24 July [1878]
Classmark:  Universitäts- und Landesbibliothek Düsseldorf (slg 60/Dok/58)
Letter no:  DCP-LETT-11629

To C. G. Semper   26 November [1878]

Summary

Discusses views of Moritz Wagner on modification of species. Two different cases: one in which a species is modified in the same country and cases in which a species splits. Glad CGS is taking up subject.

Author:  Charles Robert Darwin
Addressee:  Carl Gottfried Semper
Date:  26 Nov [1878]
Classmark:  Universitäts- und Landesbibliothek Düsseldorf (slg 60/Dok/59)
Letter no:  DCP-LETT-11760

To C. G. Semper   30 November 1878

Summary

Discusses effect of isolation on species modification and the views of Moritz Wagner on the subject.

Author:  Charles Robert Darwin
Addressee:  Carl Gottfried Semper
Date:  30 Nov 1878
Classmark:  Universitäts- und Landesbibliothek Düsseldorf (slg 60/Dok/60)
Letter no:  DCP-LETT-11767

To C. G. Semper   [after 6 December 1878]

Summary

Gives CGS permission to use his letters in any way he thinks fit.

Discusses the direct effect of external conditions as an agent of change in organisms; has encountered many cases since the publication of Origin.

Author:  Charles Robert Darwin
Addressee:  Carl Gottfried Semper
Date:  [after 6 Dec 1878]
Classmark:  DAR 202: 120v
Letter no:  DCP-LETT-11777

To C. G. Semper   2 October 1879

Summary

Discusses CGS’s account of Pellew Islands. Still believes atolls and barrier reefs in Pacific indicate subsidence. But cases like Pellew Islands, if frequent, would make his conclusions of little value.

Author:  Charles Robert Darwin
Addressee:  Carl Gottfried Semper
Date:  2 Oct 1879
Classmark:  Universitäts- und Landesbibliothek Düsseldorf (slg 60/Dok/61)
Letter no:  DCP-LETT-12245

To C. G. Semper   6 February 1881

Summary

Comments on CGS’s The natural conditions of existence [1881] and on views of Moritz Wagner on geographical distribution.

Discusses cause of variability.

Author:  Charles Robert Darwin
Addressee:  Carl Gottfried Semper
Date:  6 Feb 1881
Classmark:  Universitäts- und Landesbibliothek Düsseldorf (slg 60/Dok/62)
Letter no:  DCP-LETT-13040

To C. G. Semper   19 July 1881

Summary

Thinks CGS right not to reply to critical article by Lankester.

Discusses direct action of environment as cause of variability; the finding of Hermann Hoffmann that direct action of environment affects plants very little.

Author:  Charles Robert Darwin
Addressee:  Carl Gottfried Semper
Date:  19 July 1881
Classmark:  Universitäts- und Landesbibliothek Düsseldorf (slg 60/Dok/63)
Letter no:  DCP-LETT-13251

To C. G. Semper   21 January [1874]

Summary

Asks for information about the title and date of Semper’s essay disputing CD’s theory of coral reefs.

Author:  Charles Robert Darwin
Addressee:  Carl Gottfried Semper
Date:  21 Jan [1874]
Classmark:  Christie’s (dealers) (8 June 2005)
Letter no:  DCP-LETT-9252G
Document type
letter (11)
Author
Darwin, C. R.[X]
Addressee
Correspondent
Darwin, C. R. (11)
Semper, C. G.[X]
Date
1874 (1)
1877 (2)
1878 (5)
1879 (1)
1881 (2)
letter