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From Roland Trimen   2 September 1877

Summary

Thanks for Forms of flowers.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  2 Sept 1877
Classmark:  DAR 178: 192
Letter no:  DCP-LETT-11124

To Roland Trimen   31 January [1863]

Summary

Thanks RT for his letter and MS.

Is astonished by the different forms of orchids he describes.

Urges RT to describe and experiment with two or three of the more distinct genera.

"I believe, or am inclined to believe in one or very few primordial forms, from community of structure and early embryonic resemblances in each great class."

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  31 Jan [1863]
Classmark:  Royal Entomological Society of London (Trimen papers, box 21: 54)
Letter no:  DCP-LETT-3956

To Roland Trimen   16 February [1863]

Summary

Further discusses RT’s observations on Cape [of Good Hope] orchids and asks whether it would be possible for him to send some specimens to Kew.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  16 Feb [1863]
Classmark:  Royal Entomological Society of London (Trimen papers, box 21: 55)
Letter no:  DCP-LETT-3988

From Roland Trimen   16 March 1863

Summary

RT has sent his observations on orchids to CD. Has found only one case of an insect with a pollinium adhering to it.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  16 Mar 1863
Classmark:  DAR 70: 180, DAR 178: 184
Letter no:  DCP-LETT-4046

To Roland Trimen   23 May [1863]

Summary

CD has drawn up a paper from RT’s orchid notes on the fertilisation of Disa grandiflora for the Linnean Society [J. Linn. Soc. Lond. (Bot.) 7 (1863): 144–7].

CD would welcome seeds of any Cape Oxalis for his investigation of dimorphism.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  23 May [1863]
Classmark:  Royal Entomological Society of London (Trimen papers, box 21: 56)
Letter no:  DCP-LETT-4179

From Roland Trimen   16, 17, and 19 July 1863

Summary

Thanks CD for two letters and his portrait.

CD’s book [Orchids] opened up terra incognita for him.

His work on S. African butterflies continues.

Reports on a moth that punctures peach skins.

Interesting that thoughtful naturalists are forced to admit mutability of species.

Some notes on Oxalis.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  [16, 17 or 19] July 1863
Classmark:  DAR 99: 13–16d
Letter no:  DCP-LETT-4243

To Roland Trimen   27 August [1863]

Summary

Discusses methods of pollination in orchids.

Thinks RT should investigate Physianthus to see if it requires insect aid for fertilisation as the Asclepiadaceae do.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  27 Aug [1863]
Classmark:  Royal Entomological Society of London (Trimen papers, box 21: 57)
Letter no:  DCP-LETT-4279

From Roland Trimen   10, 13, and 18 October 1863

Summary

Comments on CD’s paper on Linum [Collected papers 2: 93–105].

Sends specimens of dimorphic and trimorphic Oxalis.

Comments on H. W. Bates’s work [Naturalist on the river Amazons].

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  [10, 13 or 18] Oct 1863
Classmark:  DAR 109: B122–3
Letter no:  DCP-LETT-4319

To Roland Trimen   25 November [1863]

Summary

CD’s doctor [J. M. Gully] has ordered him to do nothing for six months.

Thanks RT for orchid specimen.

Dares not look at Oxalis flowers.

Regrets RT cannot get seed, especially from his trimorphic flowers.

Asks for bulbs of two or three forms.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  25 Nov [1863]
Classmark:  Royal Entomological Society of London (Trimen papers. box 21: 58)
Letter no:  DCP-LETT-4347

To Roland Trimen   13 May 1864

Summary

Oxalis plants have arrived safely [see 4347].

CD regrets his mistake about Disa; will correct it.

Thanks RT for his additional facts about Disa.

Is recovering slowly from ten months’ illness.

Asks whether Strelitzia reginae grows in gardens at the Cape. Suspects it must be fertilised by a bird.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  13 May 1864
Classmark:  Royal Entomological Society (Trimen papers, box 21: 59)
Letter no:  DCP-LETT-4493

To Roland Trimen   25 November 1864

Summary

Has forwarded RT’s paper on Bonatea to the Linnean Society [J. Linn. Soc. Lond. (Bot.) 9 (1865): 156–60].

The Oxalis sent by RT flowered but CD has made out only two forms; he thinks there ought to be three, so would welcome more seed.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  25 Nov 1864
Classmark:  Royal Entomological Society of London (Trimen papers, box 21: 60)
Letter no:  DCP-LETT-4680

From Roland Trimen   13 December 1865

Summary

Butterflies of Mauritius.

RT’s Bonatea paper published by Linnean Society [J. Linn. Soc. Lond. (Bot.) 9 (1867): 156–60].

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  13 Dec 1865
Classmark:  DAR 178: 185
Letter no:  DCP-LETT-4951

To Roland Trimen   24 December [1867]

Summary

Invites RT to come to Down for a week-end.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  24 Dec [1867]
Classmark:  Royal Entomological Society (Darwin letters and papers, box 21: 61)
Letter no:  DCP-LETT-5739

From Roland Trimen   31 December 1867

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Summary

On ocelli.

Sexual differences and proportion of sexes in butterflies.

Coleoptera.

[See Descent 1: 310; 2: 132.]

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  31 Dec 1867
Classmark:  DAR 82: A30–1
Letter no:  DCP-LETT-5744

To Roland Trimen   2 January [1868]

Summary

CD seeks information on the variation of ocelli within species of butterflies.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  2 Jan [1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 62)
Letter no:  DCP-LETT-5772

From Roland Trimen   13 January 1868

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Summary

Variations in the ocelli of Lepidoptera.

Encloses six pages from his catalogue of S. African butterflies [Rhopalocera Africae australis, 2 pts (1862, 1866)].

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  13 Jan 1868
Classmark:  DAR 84.1: 40–2, 168
Letter no:  DCP-LETT-5785

To Roland Trimen   16 January [1868]

Summary

Thanks RT for drawings of ocelli, especially for the description of ocelli of S. African Saturniidae. Would like to know of any cases in which the ocelli are confined to the male, to illustrate better the case of the peacock.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  16 Jan [1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 63)
Letter no:  DCP-LETT-5790

From Roland Trimen   10 February 1868

Summary

Sends prospectus of forthcoming work by his brother [Henry Trimen] and W. T. Thiselton-Dyer [Flora of Middlesex (1869)]. Hopes CD will subscribe.

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  10 Feb 1868
Classmark:  DAR 178: 186, DAR 84.1: 135b
Letter no:  DCP-LETT-5857

To Roland Trimen   12 February [1868]

Summary

Is interested in the relative numbers of males and females of all animals; wants any instances of males, or females, being in excess.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  12 Feb [1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 64)
Letter no:  DCP-LETT-5867

From Roland Trimen   20 February 1868

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Summary

Proportion of sexes in butterflies; discussion of subject at meeting of Entomological Society, London.

Attraction of males by female Lasiocampa quercus. [see Descent 1: 311–12.]

Author:  Roland Trimen
Addressee:  Charles Robert Darwin
Date:  20 Feb 1868
Classmark:  DAR 85: B59–60a
Letter no:  DCP-LETT-5902
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letter (39)
Addressee
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1863 (8)
1864 (2)
1865 (1)
1867 (2)
1868 (15)
1869 (1)
1871 (8)
1872 (1)
1877 (1)
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