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To C. F. Claus   9 March 1877

Summary

Warm thanks for CC’s letter. CD needed no word from CC to be convinced of his high opinion.

Author:  Charles Robert Darwin
Addressee:  Carl Friedrich Claus
Date:  9 Mar 1877
Classmark:  Staatsbibliothek zu Berlin – Preußischer Kulturbesitz (Slg. Darmstaedter Lc 1859: Darwin, Charles, Bl. 210–211)
Letter no:  DCP-LETT-10885

From C. F. Claus   24 January 1869

Summary

Sends a paper on reproductive modes of Leptodera ["Organisation und Fortpflanzen von Leptodera", Schr. Ges. Beförd. Naturw. Marburg (1869)].

Criticises Ernst Haeckel’s work as too unripe and enthusiastic.

Asks CD for some specimens of cirripedes in pupal stage for a work in progress.

Author:  Carl Friedrich Claus
Addressee:  Charles Robert Darwin
Date:  24 Jan 1869
Classmark:  DAR 161: 176
Letter no:  DCP-LETT-6575

To C. F. Claus   28 January 1869

Summary

Thanks CC for two memoirs [see 6575. The other was possibly "Die Cypris-ähnliche Larve der Cirripedien", Schr. Ges. Beförd Naturw. Marburg (1869)].

Haeckel is too enthusiastic and too bold in drawing conclusions.

CD sees no reason to add to what he says on isolation, in new edition of Origin.

Lists specimens he has available for CC’s intended study of metamorphoses of Lepas.

Author:  Charles Robert Darwin
Addressee:  Carl Friedrich Claus
Date:  28 Jan 1869
Classmark:  Staatsbibliothek zu Berlin – Preußischer Kulturbesitz (Slg. Darmstaedter Lc 1859: Darwin, Charles, Bl. 205–207)
Letter no:  DCP-LETT-6581

From C. F. Claus   6 February 1869

Summary

Pleased by CD’s good opinion and offer to provide material. Discusses work he would do on cirripedes.

Moritz Wagner’s views on migration of species;

his doubts about Fritz Müller’s views on developmental stages of Crustacea.

Author:  Carl Friedrich Claus
Addressee:  Charles Robert Darwin
Date:  6 Feb 1869
Classmark:  DAR 161: 177
Letter no:  DCP-LETT-6605

From C. F. Claus   19 March 1869

Summary

The cirripede material mentioned in CD’s letter of 10 Feb has not arrived. [Asks CD to inquire of Williams and Norgate, who forwarded it.]

Author:  Carl Friedrich Claus
Addressee:  Charles Robert Darwin
Date:  19 Mar 1869
Classmark:  DAR 161: 178
Letter no:  DCP-LETT-6671

To C. F. Claus   31 March 1869

Summary

Williams and Norgate inform CD that they dispatched the small parcel to Leipzig on 23 February. CD fears it may not be worth the trouble to CC.

Author:  Charles Robert Darwin
Addressee:  Carl Friedrich Claus
Date:  31 Mar 1869
Classmark:  Staatsbibliothek zu Berlin – Preußischer Kulturbesitz (Slg. Darmstaedter Lc 1859: Darwin, Charles, Bl. 208–209)
Letter no:  DCP-LETT-6689

To C. F. Claus   2 May 1876

Summary

Thanks CC for dedication [of his Grundlage des Crustaceen-Systems (1876)]. Congratulates CC on completion of work.

Author:  Charles Robert Darwin
Addressee:  Carl Friedrich Claus
Date:  2 May 1876
Classmark:  Wiener Neue Freie Presse, 22 April 1882. p. 2
Letter no:  DCP-LETT-10492

To C. F. Claus   9 July 1876

Summary

Thanks for copy of Claus’s book, Untersuchungen zur Erforschung der genealogischen Grundlage des Crustaceen-Systems: ein Beitrag zur Descendenzlehre (Studies on the investigation of the genealogical foundation of the Crustacea: a contribution to the theory of descent; Claus 1876).

Author:  Charles Robert Darwin
Addressee:  Carl Friedrich Claus
Date:  9 July 1876
Classmark:  Christie’s (dealers) (1 December 2016)
Letter no:  DCP-LETT-10559F

From C. F. Claus   5 March 1877

Summary

Has read in the newspapers about the album of photographs of German scientists sent in tribute to CD. His name and photograph are missing only because he was not asked to participate. CC assures CD he is one of his ardent supporters.

Author:  Carl Friedrich Claus
Addressee:  Charles Robert Darwin
Date:  5 Mar 1877
Classmark:  DAR 161: 179
Letter no:  DCP-LETT-10879
Document type
letter (9)
Addressee
Correspondent
Date
1869 (5)
1876 (2)
1877 (2)
letter