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]
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]
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]
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]
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]
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]
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 |
letter | (31) |
Wallace, A. R. | (17) |
Darwin, C. R. | (14) |
Darwin, C. R. | (17) |
Wallace, A. R. | (14) |