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To C. G. Ehrenberg   23 January [1845]

Summary

Would like sketch returned [see 775].

Would be particularly thankful for result of CGE’s observations on earth of Pampas.

Asks that Ernst Dieffenbach return copperplate and woodcuts.

Author:  Charles Robert Darwin
Addressee:  Christian Gottfried Ehrenberg
Date:  23 Jan [1845]
Classmark:  Museum für Naturkunde Berlin (MfN/HBSB, N005 NL Christian Gottfried Ehrenberg Nr. 43)
Letter no:  DCP-LETT-819

To C. G. Ehrenberg   23 March [1845]

Summary

Cannot doubt that Atlantic dust comes from Africa. Could Gulf Stream have brought South American organisms to African coast?

Has come to same conclusion as CGE on volcanic origin of Patagonian stone. Formation extends 550 miles.

Could CGE examine Pampas mud to see if Infusoria are freshwater or salt-water? Results would be important.

Author:  Charles Robert Darwin
Addressee:  Christian Gottfried Ehrenberg
Date:  23 Mar [1845]
Classmark:  Museum für Naturkunde Berlin (MfN/HBSB, N005 NL Christian Gottfried Ehrenberg Nr. 43)
Letter no:  DCP-LETT-845

To C. G. Ehrenberg   19 April [1845]

Summary

Sends small specimens for CGE to examine if he wishes.

Thanks CGE for his letter on Atlantic Dust: CD hopes to send a little paper to the Geological Society of London.

If CGE should examine Pampæan mud, CD would like to know the result.

Author:  Charles Robert Darwin
Addressee:  Christian Gottfried Ehrenberg
Date:  19 Apr [1845]
Classmark:  Museum für Naturkunde Berlin (MfN/HBSB, N005 NL Christian Gottfried Ehrenberg Nr. 43 Bl. 9–10)
Letter no:  DCP-LETT-857F

To C. G. Ehrenberg   21 May [1845]

Summary

CGE’s account of Pampas mud confirms CD’s view of its origin. Will send Patagonian specimens. Discusses dust-carrying winds in the Atlantic.

Was not referring to F. J. F. Meyen’s voyage.

Corrects error concerning samples.

Author:  Charles Robert Darwin
Addressee:  Christian Gottfried Ehrenberg
Date:  21 May [1845]
Classmark:  Museum für Naturkunde Berlin (MfN/HBSB, N005 NL Christian Gottfried Ehrenberg Nr. 43)
Letter no:  DCP-LETT-870

To C. G. Ehrenberg   29 October [1845]

Summary

Sends specimens. Asks for information about specimens from Rio Gallegos.

What does CGE mean by the term "Fluthgebiete"?

French translation gives impression that Ehrenberg attributes Pampas deposit to debacle.

Author:  Charles Robert Darwin
Addressee:  Christian Gottfried Ehrenberg
Date:  29 Oct [1845]
Classmark:  Museum für Naturkunde Berlin (MfN/HBSB, N005 NL Christian Gottfried Ehrenberg Nr. 43)
Letter no:  DCP-LETT-923

From C. G. Ehrenberg   13 March 1845

Summary

Regrets J. D. Hooker did not visit Berlin.

Describes legal difficulties of Ernst Dieffenbach.

Lists species of Infusoria found in dust samples. Discusses origin of Atlantic dust. Discusses Infusoria in cosmetic paint from Tierra del Fuego and Patagonian earth. Thanks CD for samples. Would like samples from sea-bed.

Author:  Christian Gottfried Ehrenberg
Addressee:  Charles Robert Darwin
Date:  13 Mar 1845
Classmark:  DAR 39: 59a–c
Letter no:  DCP-LETT-837

From C. G. Ehrenberg    8 April 1845

Summary

Discusses table of Atlantic dust samples. Thinks dust came from South America.

Discusses Patagonian tuff samples.

Answers CD’s query about material from Pampas. Believes deposit made in brackish water.

Criticises account of Atlantic dust in F. J. F. Meyen [Reise um die Erde (1834–5)].

Author:  Christian Gottfried Ehrenberg
Addressee:  Charles Robert Darwin
Date:  8 Apr 1845
Classmark:  DAR 39: 60–1b
Letter no:  DCP-LETT-853
Document type
letter (7)
Correspondent
Darwin, C. R.[X]
Ehrenberg, C. G.[X]
Date
1845
01 (1)
03 (2)
04 (2)
05 (1)
10 (1)
letter