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To Ernst Haeckel   6 February [1868]

Summary

Delighted to hear of success of EH’s lectures.

Ernest Faivre [La variabilité des espèces (1868)] sees no reason to favour common descent of allied species.

Asks EH to pass German edition of Variation on to Gegenbaur.

Comments on work of Miklucho[-Maclay], Dohrn, and Bleek.

Has begun work on Descent.

Author:  Charles Robert Darwin
Addressee:  Ernst Philipp August (Ernst) Haeckel
Date:  6 Feb [1868]
Classmark:  Ernst-Haeckel-Haus (Bestand A-Abt. 1: 1–52/16)
Letter no:  DCP-LETT-5841

To Ernst Haeckel   30 March [1868]

Summary

Now understands importance of swim-bladder in selachians. Always imagined animal like Lepidosiren was parent form of vertebrates.

Has been nearly a month in London, collecting facts on sexual selection from breeders and at Zoological Gardens.

Astonished at hybrid of rabbit and hare. Is it certain that work was done with hare?

Author:  Charles Robert Darwin
Addressee:  Ernst Philipp August (Ernst) Haeckel
Date:  30 Mar [1868]
Classmark:  Ernst-Haeckel-Haus (Bestand A-Abt. 1: 1–52/17)
Letter no:  DCP-LETT-6070

To Ernst Haeckel   3 July 1868

Summary

Thanks for two small works.

Will read essay on man [Entstehung des Menschengeschlechts] with much interest.

Generelle Morphologie reviewed by G. Bentham ["Anniversary Address", Proc. Linn. Soc. Lond. (1867–8): lviii–c].

Extremely sceptical of hare–rabbit hybrid.

Author:  Charles Robert Darwin
Addressee:  Ernst Philipp August (Ernst) Haeckel
Date:  3 July 1868
Classmark:  Ernst-Haeckel-Haus (Bestand A-Abt. 1:1–52/18)
Letter no:  DCP-LETT-6265

To Ernst Haeckel   7 November 1868

Summary

Thanks for [Natürliche] Schöpfungsgeschichte [1868]. "What an indomitable worker you are."

Agrees with EH’s Entstehung des Menschengeschlechts [1868].

Author:  Charles Robert Darwin
Addressee:  Ernst Philipp August (Ernst) Haeckel
Date:  7 Nov 1868
Classmark:  Ernst-Haeckel-Haus (Bestand A-Abt. 1: 1–52/19)
Letter no:  DCP-LETT-6450

To Ernst Haeckel   19 November 1868

Summary

Congratulates EH on birth of child.

Mentions projected translation of Generelle Morphologie.

Comments on EH’s last book [Natürliche Schöpfungsgeschichte]. Criticises EH’s statements on palaeontology.

Author:  Charles Robert Darwin
Addressee:  Ernst Philipp August (Ernst) Haeckel
Date:  19 Nov 1868
Classmark:  Ernst-Haeckel-Haus (Bestand A-Abt. 1: 1–52/20)
Letter no:  DCP-LETT-6466

To Ernst Haeckel   20 December 1868

Summary

Concerning death of August Schleicher.

Author:  Charles Robert Darwin
Addressee:  Ernst Philipp August (Ernst) Haeckel
Date:  20 Dec 1868
Classmark:  Ernst-Haeckel-Haus (Bestand A-Abt. 1: 1–52/21)
Letter no:  DCP-LETT-6509

From Ernst Haeckel   [before 6 February 1868]

Summary

Describes his lectures on CD’s theory.

Thanks CD for copy of Variation. Comments on book.

Describes work of two protégés in Jena: Nicolas von Miklucho[-Maclay] and Anton Dohrn.

His cousin, Wilhelm Bleek, is sending an article about the origin of language.

Asks to keep book a few months longer but will return it if CD needs it [Webb and Berthelot, Histoire naturelle des Îles Canaries, vol. 3, pt 1: Géographie botanique (1840)].

Describes research on Siphonophora.

Describes life in Jena. Mentions alpine accident during wedding trip.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  [before 6 Feb 1868]
Classmark:  DAR 166: 46
Letter no:  DCP-LETT-5840

From Ernst Haeckel   23 March 1868

Summary

Has received English edition of Variation. First volume of German edition came three months ago. Comments on book.

Will send copy of recent lectures on human evolution [Entstehung des Menschengeschlechts (1868)]. Gegenbaur much interested in the subject.

Considers Selachius the ancestral form of the fish and hence of all higher vertebrates. Believes their swim-bladder became lung of amphibians.

Mentions cases of hybrid crosses between rabbits and hares producing fertile offspring.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  23 Mar 1868
Classmark:  DAR 166: 47
Letter no:  DCP-LETT-6040

From Ernst Haeckel   22 June 1868

Summary

Thanks CD for article by G. H. Lewes ["Mr Darwin’s hypotheses, pt 1", Fortn. Rev. n.s. 3 (1868): 353–73]. Comments on article.

Describes hybridisation experiment carried out on rabbits and hares by Dr Conrad.

Encloses description of Monera

and a phylogenetic table of vertebrates.

Mentions work on Medusae.

The controversy over CD in Germany.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  22 June 1868
Classmark:  DAR 166: 48
Letter no:  DCP-LETT-6255

From Ernst Haeckel   17 July 1868

Summary

Comments on CD’s health.

Has received gold medal from Dutch Academy of Science for Zur Entwicklungsgeschichte der Siphonophoren [1869].

His Entstehung des Menschengeschlechts [1868] has been sharply attacked by the clergy.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  17 July 1868
Classmark:  DAR 166: 49
Letter no:  DCP-LETT-6280

From Ernst Haeckel   9 November 1868

Summary

Thanks CD for comments [on Entstehung des Menschengeschlechts].

Comments on Goethe and Kant as early evolutionists.

Describes birth of his son. Mentions child’s "atavisms".

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  9 Nov 1868
Classmark:  DAR 166: 50
Letter no:  DCP-LETT-6452

From Ernst Haeckel   25 November [1868]

Summary

Comments on experience of being a father.

Discusses possible English edition of Generelle Morphologie. Mentions necessary revisions.

Thanks CD for comment on Natürliche Schöpfungsgeschichte.

Discusses problem of assigning specific times to origin of classes.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  25 Nov [1868]
Classmark:  DAR 166: 51
Letter no:  DCP-LETT-6474
Document type
letter (12)
Addressee
Correspondent
Darwin, C. R.[X]
Haeckel, Ernst[X]
Date
1868
02 (2)
03 (2)
06 (1)
07 (2)
11 (4)
12 (1)
letter