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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 (Trimen papers, box 21: 78)
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 (Trimen papers, box 21: 55)
Letter no:  DCP-LETT-3988

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 (Trimen papers, box 21: 56)
Letter no:  DCP-LETT-4179

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 (Trimen papers, box 21: 57)
Letter no:  DCP-LETT-4279

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 (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 (Trimen papers, box 21: 60)
Letter no:  DCP-LETT-4680

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 (Trimen papers, box 21: 61)
Letter no:  DCP-LETT-5739

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

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

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

To Roland Trimen   21 February [1868]

Summary

RT’s argument about the Lasiocampa strikes him as very good; asks for any similar cases. Wonders whether male butterflies may serve more than one female.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  21 Feb [1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 65)
Letter no:  DCP-LETT-5908

To Roland Trimen   [16 March 1868]

Summary

Asks whether RT will call.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  [16 Mar 1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 66)
Letter no:  DCP-LETT-6015

To Roland Trimen   [21 March 1868]

Summary

Arranges for RT to call.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  [21 Mar 1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 67)
Letter no:  DCP-LETT-6035

To Roland Trimen   27 March [1868]

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Summary

Thanks RT for letter which saves him from a "terrible mistake": that no moths were more brilliantly coloured beneath than above. Suggests revised version for comment. [See Descent 1: 397.]

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  27 Mar [1868]
Classmark:  DAR 82: A119–20
Letter no:  DCP-LETT-6060

To Roland Trimen   14 April [1868]

Summary

Has tried using dealers’ price-lists as a guide to sex ratios in Lepidoptera; finds numerous cases in which the sexes bring different prices and in virtually all of them the males are cheaper. This seems to confirm the impression of the field collectors.

Wishes RT good luck with natural history in S. Africa.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  14 Apr [1868]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 68)
Letter no:  DCP-LETT-6117

To Roland Trimen   24 May [1871]

Summary

Cannot explain why moths fly into candle flames and birds against lighthouses. Has felt it was just curiosity which attracted them.

CD does believe dogs have some sense of humour.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  24 May [1871]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 69)
Letter no:  DCP-LETT-7880

To Roland Trimen   27 July 1871

Summary

Invites RT to call on him while he is staying at Haredene.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  27 July 1871
Classmark:  Royal Entomological Society (Trimen papers, box 21: 70)
Letter no:  DCP-LETT-7884

To Roland Trimen   13 November [1871]

Summary

Regrets he is too unwell to see RT before his departure for the Cape; wishes him well.

Author:  Charles Robert Darwin
Addressee:  Roland Trimen
Date:  13 Nov [1871]
Classmark:  Royal Entomological Society (Trimen papers, box 21: 72)
Letter no:  DCP-LETT-8064
Document type
letter (19)
Author
Darwin, C. R.[X]
Addressee
Correspondent
Date
1863 (5)
1864 (2)
1867 (1)
1868 (8)
1871 (3)
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