To G. H. K. Thwaites 26 March 1877
Summary
Thanks for specimens [of insects].
Wonders whether difference between male and female plays part in fertilisation of fig.
Flowers of Oxalis sensitiva, sent long ago, are trimorphic and cleistogamic.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 26 Mar 1877 |
Classmark: | American Philosophical Society (Mss.B.D25.508) |
Letter no: | DCP-LETT-10913 |
From G. H. K. Thwaites 28 August 1877
Author: | George Henry Kendrick Thwaites |
Addressee: | Charles Robert Darwin |
Date: | 28 Aug 1877 |
Classmark: | DAR 178: 126 |
Letter no: | DCP-LETT-11119 |
To George Henry Kendrick Thwaites 10 December 1855
Summary
Mentions seeing GHKT at BAAS meeting at Oxford [1847].
Reports he is working on variation of species. Asks about varieties of pigeons and other poultry, and asks for specimens from Ceylon.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 10 Dec 1855 |
Classmark: | American Philosophical Society (Mss.B.D25.118) |
Letter no: | DCP-LETT-1795 |
To George Henry Kendrick Thwaites 8 March 1856
Summary
Hopes GHKT will publish on variations in plant species at different elevations. Asks about variations among plants on heights of Ceylon.
Promises to publish on the species question.
Asks for pigeons’ skins from India or Ceylon, and for ducks’ skeletons. Mentions help promised by E. F. Kelaart.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 8 Mar 1856 |
Classmark: | American Philosophical Society (Mss.B.D25.125) |
Letter no: | DCP-LETT-1837 |
To George Henry Kendrick Thwaites 7 February [1858]
Summary
Thanks GHKT for letter on plant acclimatisation and variation among alpine and lowland forms in Ceylon.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 7 Feb [1858] |
Classmark: | American Philosophical Society (Mss.B.D25.150) |
Letter no: | DCP-LETT-2211 |
To George Henry Kendrick Thwaites 31 January [1868]
Summary
Asks GHKT about eyes of screaming elephants.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 31 Jan [1868] |
Classmark: | American Philosophical Society (Mss.B.D25.325) |
Letter no: | DCP-LETT-2670 |
From George Henry Kendrick Thwaites [14 February 1860]
Summary
Questions how natural selection can explain why some cells remain simple and others are modified into highly complex structures.
Reports on the spread in Ceylon of a recently introduced plant.
Author: | George Henry Kendrick Thwaites |
Addressee: | Charles Robert Darwin |
Date: | [14 Feb 1860] |
Classmark: | DAR 205.4: 100 |
Letter no: | DCP-LETT-2697 |
To G. H. K. Thwaites 21 March [1860]
Summary
Is pleased GHKT goes a little way with him.
Has rectified in foreign editions of Origin his omission of an explanation of the failure of many forms to progress;
also has discussion of beauty in MS. Does GHKT really believe Diatomaceae, for instance, were created beautiful so that man, millions of generations later, should admire them through a microscope? CD attributes most of these structures to unknown laws of growth; useful structures are accounted for by natural selection.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 21 Mar [1860] |
Classmark: | Smithsonian Libraries and Archives (Dibner Library of the History of Science and Technology MSS 405 A. Gift of the Burndy Library) |
Letter no: | DCP-LETT-2731 |
To G. H. K. Thwaites 20 October [1860]
Summary
Thanks for fact about ducks in Ceylon. Asks for more information.
Pleased by GHKT’s sentence [about Origin].
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 20 Oct [1860] |
Classmark: | The New York Public Library. Astor, Lenox and Tilden Foundations. Manuscripts and Archives Division. (Richard John Levy and Sally Waldman Sweet collection: box 2, folder 12) |
Letter no: | DCP-LETT-2957 |
From George Henry Kendrick Thwaites 15 May 1862
Summary
Sends CD a quotation from Plato which anticipates the Origin.
Has been enjoying CD’s paper on dimorphism in the Journal of the Linnean Society ["Two forms of Primula", Collected papers 2: 45–63]. He has found similar structures [see Forms of flowers, pp. 116, 122].
Author: | George Henry Kendrick Thwaites |
Addressee: | Charles Robert Darwin |
Date: | 15 May 1862 |
Classmark: | DAR 110: B79–80, DAR 171: 3 |
Letter no: | DCP-LETT-3550 |
To G. H. K. Thwaites 15 June [1862]
Summary
Refers to his Primula paper [Collected papers 2: 45–63]. Asks GHKT to investigate a similar case in Cinchona.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 15 June [1862] |
Classmark: | American Philosophical Society (Mss.B.D25.278) |
Letter no: | DCP-LETT-3606 |
To G. H. K. Thwaites 20 June [1862]
Summary
Asks for information concerning heterostyled and dioecious plants.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 20 June [1862] |
Classmark: | American Philosophical Society (Mss.B.D25.280) |
Letter no: | DCP-LETT-3613 |
To G. H. K. Thwaites 29 December [1862]
Summary
Asks for any authentic cases of "sports", which CD calls "bud-variations". Flowers introduced from warmer temperate regions are said to be particularly apt to sport in this way.
CD now has proof that Cinchona is dimorphic and that some dimorphic plants are absolutely sterile with their own-form pollen.
Asks GHKT to examine or send pollen specimens of two Ceylon genera.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 29 Dec [1862] |
Classmark: | Cleveland Health Sciences Library (Robert M. Stecher collection) |
Letter no: | DCP-LETT-3880 |
From George Henry Kendrick Thwaites 17 February 1863
Summary
Replies to CD’s letter: dimorphism common in Ceylon Rubiaceae. [See Forms of flowers, p. 286.]
Author: | George Henry Kendrick Thwaites |
Addressee: | Charles Robert Darwin |
Date: | 17 Feb 1863 |
Classmark: | DAR 109: A94 |
Letter no: | DCP-LETT-3994 |
To G. H. K. Thwaites 30 March [1863]
Summary
Thanks GHKT for specimens of Sethia. Discusses functions of their dimorphism for insect fertilisation.
Discusses polymorphism and fertilisation in Lythraceae.
Asks for seed of Limnanthemum.
Describes his interest in galls.
Discusses curious specimens of Gomphia and Lesemia.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 30 Mar [1863] |
Classmark: | American Philosophical Society (Mss.B.D25.293) |
Letter no: | DCP-LETT-4067 |
From G. H. K. Thwaites 8 June 1863
Summary
Dimorphism in Linum.
Situation in some of the lower Algae is analogous to that in phaenogams. In some, conjugation occurs between separate filaments, in others between cells of same filament.
Forwards a letter from S. O. Glenie enclosing specimens of Cassia fistula which show the two forms of the anthers.
Author: | George Henry Kendrick Thwaites |
Addressee: | Charles Robert Darwin |
Date: | 8 June 1863 |
Classmark: | DAR 178: 121–2 |
Letter no: | DCP-LETT-4208 |
To G. H. K. Thwaites 29 July [1863]
Summary
Thanks GHKT for Limnanthemum seed.
Comments on his view of algal reproduction.
Discusses flower of Cassia.
Sends photograph of himself.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 29 July [1863] |
Classmark: | American Philosophical Society (Mss.B.D25.295) |
Letter no: | DCP-LETT-4256 |
From G. H. K. Thwaites 24 September 1863
Summary
Sends information on the flowers of Cassia roxburghii; will send flowers of all the species of Cassia for CD to study with a view to discovering the law which operates to bring about the differences.
Author: | George Henry Kendrick Thwaites |
Addressee: | Charles Robert Darwin |
Date: | 24 Sept 1863 |
Classmark: | DAR 48: 74 |
Letter no: | DCP-LETT-4303 |
From G. J. MacCarthy to G. H. K. Thwaites 13 May [1862]
Summary
Sends a transcription of Plato’s Timaeus, sect. 44, but does not think this cosmogony foreshadows Darwinian theory.
Author: | Charles Justin MacCarthy |
Addressee: | George Henry Kendrick Thwaites |
Date: | 13 May [1862] |
Classmark: | DAR 171: 3 |
Letter no: | DCP-LETT-5090 |
To G. H. K. Thwaites 13 February [1868]
Summary
Asks whether mane in male of Macacus silenus protects it from bites or is merely ornamental.
Author: | Charles Robert Darwin |
Addressee: | George Henry Kendrick Thwaites |
Date: | 13 Feb [1868] |
Classmark: | American Philosophical Society (Mss.B.D25.341) |
Letter no: | DCP-LETT-5872 |
letter | (31) |
Darwin, C. R. | (18) |
Thwaites, G. H. K. | (9) |
Glenie, S. O. | (2) |
Layard, C. P. | (1) |
MacCarthy, C. J. | (1) |
Thwaites, G. H. K. | (22) |
Darwin, C. R. | (9) |
Thwaites, G. H. K. | (31) |
Darwin, C. R. | (27) |
Glenie, S. O. | (2) |
Layard, C. P. | (1) |
MacCarthy, C. J. | (1) |