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To A. R. Wallace   [24 June 1867]

Summary

CD now acknowledges that the sometimes very great sexual, i.e., ornamental, differences in fishes offer a difficulty to the view that females are not brightly coloured on account of the danger to propagation of the species.

Author:  Charles Robert Darwin
Addressee:  Alfred Russel Wallace
Date:  [24 June 1867]
Classmark:  The British Library (Add 46434, f. 74)
Letter no:  DCP-LETT-5404

To Alfred Russel Wallace   23 February 1867

Summary

Asks why caterpillars are sometimes beautifully coloured. It poses a problem for view that sexual selection is the explanation of colours of male butterflies.

More on mimetic butterflies.

Author:  Charles Robert Darwin
Addressee:  Alfred Russel Wallace
Date:  23 Feb 1867
Classmark:  Marchant ed. 1916, 1: 178
Letter no:  DCP-LETT-5415

To A. R. Wallace   26 February [1867]

Summary

ARW’s explanation of protective value of conspicuous coloration is ingenious.

CD still holds to sexual selection with respect to beauty in male butterflies.

Sexual selection and the races of man.

Expression of emotions is another subject he plans to include in his essay [Descent].

Asks ARW to suggest an observer in Malay Archipelago to whom he might send queries [on expression].

Author:  Charles Robert Darwin
Addressee:  Alfred Russel Wallace
Date:  26 Feb [1867]
Classmark:  The British Library (Add 46434, f. 76)
Letter no:  DCP-LETT-5420

To A. R. Wallace   [12–17] March [1867]

Summary

Asks to be kept informed on gaudy caterpillars.

Problems of his work on man; scope and role of sexual selection.

Indulgence of interest in expression is simply a "hobby-horse". Will see whether he can get queries inserted in an Indian newspaper.

Author:  Charles Robert Darwin
Addressee:  Alfred Russel Wallace
Date:  [12–17] Mar [1867]
Classmark:  The British Library (Add 46434 ff. 80–83v)
Letter no:  DCP-LETT-5440

To A. R. Wallace   29 April [1867]

Summary

Comments on ARW’s view of colouring in relation to sexual selection and protection. It is not new to CD. Hopes to discuss subject fully in his "Essay on Man" [Descent]. As to the problem of brightly coloured females, CD is not satisfied that it is due to males taking over incubation. Admires "value and beauty" of ARW’s generalisations.

Author:  Charles Robert Darwin
Addressee:  Alfred Russel Wallace
Date:  29 Apr [1867]
Classmark:  The British Library (Add 46434, f. 84)
Letter no:  DCP-LETT-5517

To A. R. Wallace   5 May [1867]

Summary

Returns ARW’s notes. He will work up subject much better than CD.

Apologises for the note of illiberality in his letter regarding ARW’s work on the colouring and other sexual differences in mammals.

Discusses laws of inheritance based on sexual selection.

He questions the extent of applicability of principles of protection and sexual selection to lower animal forms, though Ernst Haeckel has shown how protection may account for transparency and absence of colour in lower oceanic animals.

Author:  Charles Robert Darwin
Addressee:  Alfred Russel Wallace
Date:  5 May [1867]
Classmark:  The British Library (Add 46434 f. 89)
Letter no:  DCP-LETT-5528

To A. R. Wallace   6 July [1867]

Summary

Acknowledgment of article on mimicry [Westminster Rev. 88 (1867): 1–43].

Author:  Charles Robert Darwin
Addressee:  Alfred Russel Wallace
Date:  6 July [1867]
Classmark:  The British Library (Add 46434, f. 92)
Letter no:  DCP-LETT-5579

To A. R. Wallace   12 and 13 October [1867]

Summary

Response to ARW’s "Creation by law", especially the Angraecum sesquipedale and the predicted Madagascar moth.

ARW’s argument on beauty strikes CD as good.

Wishes ARW had made more clear the assumption of the reviewer [in North Br. Rev.] that each variation is a strongly marked one.

The Duke of Argyll’s argument on beauty is not candid.

Author:  Charles Robert Darwin
Addressee:  Alfred Russel Wallace
Date:  12 and 13 Oct 1867
Classmark:  The British Library (Add 46434 f. 96)
Letter no:  DCP-LETT-5648

To A. R. Wallace   7 March [1867]

Summary

Grateful for addresses of informants, especially that of Rajah James Brooke.

Dispatch of queries on expression. Answers will make interesting appendix to his "Essay on man" [Descent].

Protective adaptation of female butterflies believed probable.

Believes in sexual selection as applied to man.

Author:  Charles Robert Darwin
Addressee:  Alfred Russel Wallace
Date:  7 Mar [1867]
Classmark:  The British Library (Add 46434 ff. 20–20v)
Letter no:  DCP-LETT-5992
Document type
letter (9)
Author
Addressee
Wallace, A. R.[X]
Correspondent
Date
1867
02 (2)
03 (2)
04 (1)
05 (1)
06 (1)
07 (1)
10 (1)
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