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From Alfred Russel Wallace   7 February 1868

Summary

Thanks for Variation.

Reports work on his travel book [The Malay Archipelago (1869)].

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  7 Feb 1868
Classmark:  DAR 106: B48
Letter no:  DCP-LETT-5848

From A. R. Wallace   24 February 1868

Summary

Responds to CD’s queries on polygamy in birds and orang.

Discusses sexual selection and secondary characters; colours and sexual preference.

Expresses his admiration for Pangenesis; it is superior to Herbert Spencer’s theory.

ARW differs somewhat with CD’s chapter on causes of variability [ch. 22 in Variation]. Thinks several of CD’s arguments are unsound.

Briefly discusses how natural selection might aid in producing sterility between allied species.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  24 Feb 1868
Classmark:  DAR 106: B70–2, DAR 86: A10–11
Letter no:  DCP-LETT-5922

From A. R. Wallace   1 March 1868

Summary

Offers enclosure demonstrating that natural selection could produce sterility of hybrids.

More on Pangenesis and the inadequacy of H. Spencer’s approach.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  1 Mar 1868
Classmark:  DAR 106: B49–50, B53–5
Letter no:  DCP-LETT-5966

From A. R. Wallace   8 March [1868]

Summary

On critical exchanges at the Linnean Society on natural selection and mimicry.

Roland Trimen’s paper on South African mimetic butterflies ["On some remarkable mimetic resemblances among African butterflies", Trans. Linn. Soc. Lond. 26 (1870): 497–523; read 5 Mar 1868].

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  8 Mar [1868]
Classmark:  DAR 106: B51–2
Letter no:  DCP-LETT-5996

From A. R. Wallace   15 March [1868]

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Summary

Coloration of butterflies; brilliantly coloured females.

Commends CD on his paper on specific differences in Primula [J. Proc. Linn. Soc. Lond. (Bot.) 10 (1869): 437–54; reprinted and revised in Forms of flowers] as a test-case proving origin of real species.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  15 Mar [1868]
Classmark:  DAR 82: 23–4
Letter no:  DCP-LETT-6012

From A. R. Wallace   19 March 1868

Summary

On sterility of natural species and natural selection. Closely allied forms from adjacent islands offer best chance of finding good species fertile inter se.

Problem of minute variations and sexual selection.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  19 Mar 1868
Classmark:  DAR 106: B59–60
Letter no:  DCP-LETT-6024

From A. R. Wallace   24 March [1868]

Summary

Returns George Darwin’s criticisms of his notes on sterility and sends further notes in reply. Since there are degrees of sterility between varieties, "is it not probable that natural selection can accumulate these variations?" Varieties that are adapted to new conditions could then survive and form new species without being isolated.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  24 Mar [1868]
Classmark:  DAR 106: B61–2, B158–9
Letter no:  DCP-LETT-6045

From A. R. Wallace   8 [April] 1868

Summary

If CD is not convinced by his notes on sterility, ARW has little doubt that he is wrong. In fact he was only half-convinced by his own arguments.

Modifies his first proposition [a species varies occasionally in two directions, but owing to free inter-crossing the variations never increase] and further discusses the subject.

Encloses Berthold Seemann’s notes on flora of the Hawaiian Islands. Presence of European alpine species in Hawaiian volcanoes is a "hard nut" for geographical distribution [but see ARW’s Island life (1880), p. 323].

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  8 [Apr] 1868
Classmark:  DAR 106: B57-8
Letter no:  DCP-LETT-6104

From A. R. Wallace   28 April [1868]

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Summary

Various topics related to sexual selection: sexual differences, sexual preferences, coloration.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  28 Apr [1868]
Classmark:  DAR 84.1: 120–4
Letter no:  DCP-LETT-6144

From A. R. Wallace   1 May [1868]

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Summary

Answers CD’s objection [see 6121 and 6146] about sexual differences and protective colouring. Summarises his theory of colour in nature.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  1 May [1868]
Classmark:  DAR 83: 191–2
Letter no:  DCP-LETT-6153

From A. R. Wallace   16 August [1868]

Summary

The problem of sterility, and its relation to natural selection.

George Bentham’s support of Darwinism.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  16 Aug [1868]
Classmark:  DAR 106: B63–4
Letter no:  DCP-LETT-6318

From A. R. Wallace   30 August [1868]

Summary

On triumph of "Darwinianism".

Discussion of their differences on subject of protection.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  30 Aug [1868]
Classmark:  DAR 106: B65–6
Letter no:  DCP-LETT-6334

From A. R. Wallace   5 September [1868]

Summary

Accepts invitation.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  5 Sept [1868]
Classmark:  DAR 106: B67
Letter no:  DCP-LETT-6350

From A. R. Wallace   [11 September 1868]

Summary

ARW’s wife will accompany him to Down.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  [11 Sept 1868]
Classmark:  DAR 148: 426b
Letter no:  DCP-LETT-6362

From A. R. Wallace   [14 September 1868]

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Summary

On sounds produced by Euchirus longimanus beetle. Sends a pair by post.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  [14 Sept 1868]
Classmark:  DAR 82: A25–6
Letter no:  DCP-LETT-6364

From A. R. Wallace   18 September [1868]

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Summary

Submits a 15–point argument against CD’s views on the coloration of female birds and insects.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  18 Sept [1868]
Classmark:  DAR 82: A14–17
Letter no:  DCP-LETT-6375

From A. R. Wallace   4 October 1868

Summary

Sexual differences in coloration. Sexual selection versus natural selection as explanations. ARW continues to argue against sexual selection, saying that natural selection, in keeping the female dull for protection, would account for differences in sexual colouring more effectively than inheritance and partial transmission of sexually selected male colours. Colours of female birds of paradise. Protective coloration. Disagrees with CD on coincidence of hidden nests and bright colours of females.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  4 Oct 1868
Classmark:  DAR 106: B68–69
Letter no:  DCP-LETT-6408
Document type
letter (17)
Author
Wallace, A. R.[X]
Addressee
Correspondent
Darwin, C. R. (17)
Wallace, A. R.[X]
Date
1868
02 (2)
03 (5)
04 (2)
05 (1)
08 (2)
09 (4)
10 (1)
letter