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 Daniel Sharpe [4 November 1846]
Summary
Supposes Sharpe does not want Von Buch’s tract, so sent Hopkins. Asks it be returned to CD at the Athenaeum Club.
| Author: | Charles Robert Darwin |
| Addressee: | Daniel Sharpe |
| Date: | [4 Nov 1846] |
| Classmark: | James Cummins, Bookseller (dealer) (December 2010) |
| Letter no: | DCP-LETT-1017F |
To Daniel Sharpe [19 January 1847]
Summary
Comments on letter by Bernhard Studer ["Remarks on the geological relations of the gneiss of the Alps", Edinburgh New Philos. J. 42 (1846–7): 186] and on article by DS ["On slaty cleavage", J. Geol. Soc. Lond. 3 (1847): 74–105]. Discusses geological cleavage and foliation.
| Author: | Charles Robert Darwin |
| Addressee: | Daniel Sharpe |
| Date: | [19 Jan 1847] |
| Classmark: | The British Library (Add MS 42240: 21–2) |
| Letter no: | DCP-LETT-1052 |
To Daniel Sharpe [23 January 1847]
Summary
Comments on manuscript [? "On slaty cleavage", J. Geol. Soc. Lond. 5 (1849): 111–29]. Discusses phenomenon of cleavage. Will write to J. D. Forbes about DS’s paper.
| Author: | Charles Robert Darwin |
| Addressee: | Daniel Sharpe |
| Date: | [23 Jan 1847] |
| Classmark: | UCL Library Services, Special Collections (PEARSON/10/1) |
| Letter no: | DCP-LETT-1083 |
To Daniel Sharpe 16 October [1851]
Summary
Thanks DS for writing about his research on foliation and cleavage. Discusses nature of slate and metamorphic schists.
Makes suggestions for the paper DS is preparing for the Royal Society and raises questions for his consideration; CD hopes he can attend the Society meeting when the paper is read ["On foliation and cleavage of Scotland", Philos. Trans. R. Soc. Lond. 142 (1852): 445–62].
| Author: | Charles Robert Darwin |
| Addressee: | Daniel Sharpe |
| Date: | 16 Oct [1851] |
| Classmark: | American Philosophical Society (Mss.B.D25.) |
| Letter no: | DCP-LETT-1458 |
To Daniel Sharpe 12 November [1854]
Summary
Regrets he cannot come to hear DS’s paper ["On the structure of Mont Blanc", Q. J. Geol. Soc. Lond. 11 (1855): 11–27]. Has a lively interest in the subject.
Edward Forbes has misrepresented his view on foliation and cleavage [Athenæum 30 Sept 1854].
CD is convinced DS’s view will replace Huttonian and Lyellian view of metamorphic schists.
Recommends H. C. Sorby’s paper [probably "On the origin of slaty cleavage", Edinburgh New Philos. J. 55 (1853): 137–50].
| Author: | Charles Robert Darwin |
| Addressee: | Daniel Sharpe |
| Date: | 12 Nov [1854] |
| Classmark: | University of Chicago Library, Special Collections Research Center |
| Letter no: | DCP-LETT-1599 |
To Daniel Sharpe 23 August [1848?]
Summary
Thanks for note.
Glad DS sticks to cleavage and foliation question. Bernhard Studer one of few to take correct view on subject.
| Author: | Charles Robert Darwin |
| Addressee: | Daniel Sharpe |
| Date: | 23 Aug [1848?] |
| Classmark: | DAR 147: 47 |
| Letter no: | DCP-LETT-991 |
DCP-LETT-1049
Summary
Cancelled: same as 1083. Discusses manuscript by DS on slaty cleavage. Thinks of cleavage analogous to his own explanation of laminated lava.
| Author: | Daniel Sharpe |
| Addressee: | Charles Robert Darwin |
| Date: | [23 Jan 1847] |
| Classmark: | DAR 147: 473 |
| Letter no: | DCP-LETT-1049 |
| letter | (8) |
| Darwin, C. R. | (7) |
| Sharpe, Daniel | (1) |
| Sharpe, Daniel | (7) |
| Darwin, C. R. | (1) |
