To Ernst Dieffenbach 6 April [1846]
Summary
On geological works of Tschudi and Buch.
"My health keeps indifferent & I do not suppose I shall ever be a strong man again: everything fatigues me, & I can work but little at my writing: this summer, however, I shall get out my geology of S. America".
"I found Bronn’s Geschichte, which you recommended me, very useful, for references to facts on variation".
| Author: | Charles Robert Darwin |
| Addressee: | Ernst Dieffenbach |
| Date: | 6 Apr [1846] |
| Classmark: | J. A. Stargardt (dealers) (Catalogue 574 11–13 November 1965) |
| Letter no: | DCP-LETT-972 |
To Daniel Sharpe [1 November 1846]
Summary
Discusses foliation and cleavage. Comments on dip of cleavage laminae in mountains. Mentions views of Sedgwick and Studer. Suggests reading C. L. von Buch [Travels through Norway and Lapland (1813)] "as an amusement". Praises views of William Hopkins. Suggests reading paper by H. D. Rogers ["On cleavage of slate-strata", Edinburgh New Philos. J. 41 (1846): 422–3)]. Comments on the paper.
| Author: | Charles Robert Darwin |
| Addressee: | Daniel Sharpe |
| Date: | [1 Nov 1846] |
| Classmark: | The British Library (Add MS 37725: ff. 4–5) |
| Letter no: | DCP-LETT-1016 |
To John Gould [c. October 1846]
Summary
Recommends Ernst Dieffenbach for expedition to Guatemala.
| Author: | Charles Robert Darwin |
| Addressee: | John Gould |
| Date: | [c. Oct 1846] |
| Classmark: | Cambridge University Library Add 4251: 329 |
| Letter no: | DCP-LETT-13812 |
| letter | (3) |
| Darwin, C. R. | (3) |
| Dieffenbach, Ernst | (1) |
| Gould, John | (1) |
| Sharpe, Daniel | (1) |
| Darwin, C. R. | (3) |
| Dieffenbach, Ernst | (1) |
| Gould, John | (1) |
| Sharpe, Daniel | (1) |
