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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:  British Library (Add 37725: 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

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

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:  British Library (Add 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
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
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