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From Ernst Haeckel   11 January 1866

Summary

Comments on CD’s health.

Discusses origin of life and differentiation of principal classes of plants and animals.

Discusses Generelle Morphologie and its chapter on embryological development.

His lectures on CD’s theory.

Asks CD for larger portrait of himself and for several copies of the small photograph. Will send photographs of German scientists in exchange.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  11 Jan 1866
Classmark:  DAR 166: 41
Letter no:  DCP-LETT-4973

To Ernst Haeckel   20 January [1866]

Summary

Sends copies of photographs of himself. Asks for photographs of German naturalists.

Comments on EH’s account of Protogenes primordialis.

Author:  Charles Robert Darwin
Addressee:  Ernst Philipp August (Ernst) Haeckel
Date:  20 Jan [1866]
Classmark:  Ernst-Haeckel-Haus (Bestand A-Abt. 1-52/8)
Letter no:  DCP-LETT-4980

From Ernst Haeckel   28 January 1866

Summary

Discusses exchange of photographs with German scientists.

Comments on attitudes of German scientists toward CD’s theory.

Names several scientists who exchanged photographs: Braun, Virchow, Leydig, and Dohrn.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  28 Jan 1866
Classmark:  DAR 166: 42
Letter no:  DCP-LETT-4985

To Ernst Haeckel   1 February 1866

Summary

Thanks for photographs [of German scientists].

Author:  Charles Robert Darwin
Addressee:  Ernst Philipp August (Ernst) Haeckel
Date:  1 Feb 1866
Classmark:  Ernst-Haeckel-Haus (Bestand A-Abt. 1-52/9)
Letter no:  DCP-LETT-4990

To Ernst Haeckel   18 August [1866]

Summary

Comments on sheet of EH’s Generelle Morphologie [1866]. In emphasising divergence of character EH shows his clear understanding of CD’s views. It was years before CD saw necessity of divergence.

Interested in Carl Claus [Copepodenfauna von Nizza (1866)].

Author:  Charles Robert Darwin
Addressee:  Ernst Philipp August (Ernst) Haeckel
Date:  18 Aug [1866]
Classmark:  Ernst-Haeckel-Haus (Bestand A-Abt. 1: 1-52/10)
Letter no:  DCP-LETT-5193

To Ernst Haeckel   [20 October 1866]

Summary

Explains how to get to Down for visit.

Author:  Charles Robert Darwin
Addressee:  Ernst Philipp August (Ernst) Haeckel
Date:  [20 Oct 1866]
Classmark:  Ernst-Haeckel-Haus (Bestand A-Abt. 1-52/11)
Letter no:  DCP-LETT-5224

From Ernst Haeckel   19 October 1866

Summary

Will visit CD on Sunday, 21 October.

Will spend winter in research on Madeira and Tenerife.

CD will soon receive copy of Generelle Morphologie.

Author:  Ernst Philipp August (Ernst) Haeckel
Addressee:  Charles Robert Darwin
Date:  19 Oct 1866
Classmark:  DAR 166: 43
Letter no:  DCP-LETT-5248
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